Quantitative Aptitude • Ratio, Average & MixtureMedium
What is the mean proportional between 144 and 196?
A. 170
B. 336
C. 168✓ Correct Answer
D. 172
💡 Solution & Explanation
The mean proportional between two numbers a and b is √(a × b). Here √(144 × 196) = √28224 = 168. Check: 144 : 168 = 168 : 196, because 144 × 196 = 168 × 168 = 28224. The average (170) is a different idea.
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