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Question
Find the fourth proportional to 1.5, 4.5 and 3.5
Solution
Let the fourth proportional to 1.5, 4.5 and 3.5 be x.
`\implies` 1.5 : 4.5 = 3.5 : x
`\implies` 1.5 × x = 3.5 × 4.5
`\implies` x = 10.5
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