Two numbers are x and 4x, and their mean proportional is 456976. Find x.
Show answer & explanation
Correct answer: D
Explanation
The correct answer is Option 4 i.e. 228488.
Mean proportional between x and 4x = √(x × 4x) = √(4x²) = 2x
2x = 456976 → x = 456976 ÷ 2 = 228488