Question : Find the third proportion to 14 and 56.
Option 1: 220
Option 2: 218
Option 3: 212
Option 4: 224
Correct Answer: 224
Solution :
Let the third proportion be $x$.
According to the question,
$14:56::56:x$
⇒ $\frac{14}{56}=\frac{56}{x}$
⇒ $x=\frac{56×56}{14}$
⇒ $x=224$
Hence, the correct answer is 224.
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