Missing term 2

What is the missing term for the Geometric Progression (GP) 3, 15, 75,__, 1875?

Correct answer:

a₄ =  375

Step-by-step explanation:

$$\begin{gathered} a_1=3 \\ {a}_2=15 \\ r=a_2\mathrm{/}{a}_1=15\mathrm{/}3=5 \\ {a}_3=75 \\ {a}_4=r\cdot a_3=5\cdot 75=375 \end{gathered}$$

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