The ratio of the third proportional to 16 & 40 and the mean proportional between 10 & 40 is:

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The ratio of the third proportional to 16 & 40 and the mean proportional between 10 & 40 is:

A5 ∶ 1

B1 ∶ 5

C4 ∶ 1

D1 ∶ 4

Answer:

A. 5 ∶ 1

Read Explanation:

mean proportion of 10 & 40 = √400 = 20 Third proportion of 16 & 40 = (40)²/16 = 100 Required ratio = 100 : 20 = 5 : 1

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