Solve $\frac{?}{529}=\frac{329}{?}$ [SBI Jr. Associates (Pre.) Exam, 2016]
(a)404
(b)408
(c)410
(d)414
(e)416
Answer
Answer (as printed): E
Explanation
Let the missing number be $x ; \frac{x}{529}=\frac{329}{x}$ $$\begin{aligned} & x \times x=529 \times 329 \\ & x=\sqrt{174041}=417.18 \approx 416 \end{aligned}$$ Hence, the number is 416.
Explanation as extracted from the printed page; notation may be imperfect.