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प्रश्न
Find the fourth proportional to `(1)/(3), (1)/(4), (1)/(5)`
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उत्तर
Let fourth proportional to `(1)/(3), (1)/(4), (1)/(5)` be x
then `(1)/(3) : (1)/(4) : : (1)/(5) : x`
⇒ `(1)/(3) xx x = (1)/(4) xx (1)/(5)`
⇒ x = `(1)/(4) xx (1)/(5) xx (3)/(1) = (3)/(20)`.
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