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Question : The mean proportion between 7 and 112 is:

Option 1: 42

Option 2: 28

Option 3: 21

Option 4: 14


Team Careers360 9th Jan, 2024
Answer (1)
Team Careers360 15th Jan, 2024

Correct Answer: 28


Solution : The mean proportion of two numbers is equal to the square root of the product of two quantities in a ratio.
Let $x$ be the mean proportion of 7 and 112.
Then, $x$ = $\sqrt {7 × 112}$
⇒ $x$ = $\sqrt {7 × 7 × 4 × 4}$
⇒ $x$ = 28
Hence, the correct answer is 28.

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