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Find the third proportional to 2, 5 and 15

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Find the third proportional to 2, 5 and 15
1. 5
2. 6
3. 9
4. 15
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Correct Answer - Option 2 : 6

Calculation:

Let the third proportion be x

Now, 2 ∶ 5 ∶∶ x ∶ 15

⇒ 2/5 = x/15

⇒ x = (2/5) × 15

⇒ x = 6

∴ The third proportion of the given number is 6

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