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    Question

    If 'R' is the prime number 3, then find the fourth

    proportion of (R + 2), (R - 1) and (R + 7).
    A 5 Correct Answer Incorrect Answer
    B 4 Correct Answer Incorrect Answer
    C 3 Correct Answer Incorrect Answer
    D 6 Correct Answer Incorrect Answer

    Solution

    'R' = 3

    So, the numbers are 5, 2 and 10.

    Let fourth proportion be 'm'.

    So, 5m = 2 × 10

    Or, 5m = 20

    Or, 'm' = 4

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