Ratio - math problems

On solving problems and tasks proportionally, we recommend a hint rule of three. Rule of three (proportionality) helps solve examples of direct and inverse proportionality. Three members make it possible to calculate the fourth - unknown member.

Number of problems found: 688

  • A rectangle 8
    rectangles A rectangle measuring 6 cm and 4 cm is enlarged by the ratio 3:1. What is the area of the enlarged rectangle?
  • Change per hour
    autumn On Sunday, the temperature was 63 degrees at 2 pm. The temperature was then 72 degrees at 5 pm. What is the rate of change per hour?
  • Write 4
    ratios Write each ratio as a fraction of whole numbers: a 4.8 to 11.2 6) 2.7 to 0.54
  • Sharing money
    penize A certain sum of money is shared in the ratio 2 :3:9. If the difference between the first and the second is $40, then the amount of money shared is
  • A sum
    pizza A sum of money is shared between Peter, John and Henry in the ratio 2:3:5. a) express Henry's share as fraction of John's share. b) what fraction of the whole sum of money is John's share?
  • Gas prices 2021
    gasprom According to the SPP price list in 2021, the price of natural gas together with its supply is as follows: D1 - we cook. Fix 3.34 euros/month and 0.0479 euros/kWh (1 cubic meter of gas is approximately 10.555 kWh. It is called combustion heat and changes o
  • Straight-line depreciation
    factory_butter Olsen Inc. Purchased a $580,000 machine to manufacture a specialty tap for electrical equipment. The tap is in high demand and Olsen can sell all that it could manufacture for the next 10 years. To encourage capital investments, the government exempts tax
  • Two numbers
    eq1 One number is by 79 larger than the other. If we divide the larger number by the smaller one, we get the ratio 5 and the remainder 11. Determine both numbers.
  • Aspect ratio
    frame Determine the ratio of the length to the width of a picture frame that is 12 3/4 inches long and 8 1/2 inches wide.
  • Markus painter
    painter Markus used ¾ liter of paint to cover 10 ½ square meters of wall. How many liters of paint is needed to cover 12 ¼ square meters of wall?
  • Colorado
    Colorado The state Colorado has the shape of a rectangle. The map is sold on 2 posters. The first has dimensions of 70 cm and 50 cm in a scale of 1: 1,000,000. The second poster has dimensions of 175 cm and 125 cm. What is the scale of the second poster?
  • Three animals
    cow Ramrao bought a cow, a buffalo and an ox for a total of rs 85,000. if the ratio of price of cow, buffalo and ox is 4: 8: 5, then what is the price of ox?
  • Salt solution
    Salt-Sodium-Chloride-NaCl Calculate the weight of a 50% salt solution that we prepare from 120 g of salt.
  • A perimeter
    paralleogram_axes A perimeter of a parallelogram is 2.8 meters. The length of one of its sides is equal to one-seventh of the entire perimeter. Find lengths of the sides of the parallelogram.
  • The ratio 4
    ratios2 The ratio of two number is 5:4 if 40% of the first number is 12, what will be 50% of the second number?
  • Nails
    klince If a keg of nails costs $129.45 and 6/7 of the keg is used, what is the value of the remaining nails?
  • Math club
    math A math club has 25 members of which 11 are male and the rest are female. What is the ratio of all male to all club?
  • Two fifth
    factory_butter Two fifth of the worker in a factory are men. The rest are women. If there 28 men . how many more women than men are there?
  • The ratio 3
    skola The ratio of male pupils to female pupils in Gymnasium is 7:9. If there are 512 pupils, how many pupils are male?
  • An orchard
    cherry In an orchard, there are 28 apple trees, 27 orange trees, and 14 cherry trees. What is the ratio of apple trees to cherry trees?

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