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  1. Find the 4th proportional to 4 , 16 and 7 ,
    1. 28
    2. 29
    3. 22
    4. 25
Correct Option: A

Lat the 4th proportional = N
Then, 4 : 16 : : 7 : N
⇒ 4/16 = 7/N
⇒ 4N = 7 x 16
∴ N = (7 x 16)/4 = 7 x 4 = 28


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