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प्रश्न
Find the value of x of the following such that the given numbers are in proportion.
45, 135, 90 and x
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उत्तर
∵ 45, 135, 90 and x are in proportion
∴ `45/135=90/"x"`
⇒ 45 × x =90 × 135
⇒ x = `(90xx135)/45=270`
∴ x = 270
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