Two numbers are x and 4x, and their mean proportional is 456976. Find x.

Correct option is C

Given:
Two numbers are x and 4x
Mean proportional between them = 456976
Formula Used:
Mean Proportional of a and b = $$\sqrt{ab}$$​​
Solution:
$$\sqrt{x \times 4x} = 456976$$​​
2x = 456976
x = 228488
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