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What is the third proportional to 28 and 112?

A84

B336

C224

D448

Answer:

D. 448

Read Explanation:

The third proportional (x) satisfies:

28 : 112 = 112 : x

So,
x=112×11228x = \frac{112 \times 112}{28}

x=1254428=448x = \frac{12544}{28} = 448

Answer: 448

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