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Finding the Fourth Proportional to 1,417.71, 2,127.00 and 724.87

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Solution

The fourth proportional to 1,417.71, 2,127.00 and 724.87 is: 1,087.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,417.71 : 2,127.00 = 724.87 : x
  2. Step 2: Convert to fraction form
    1,417.71/2,127.00 = 724.87/x
  3. Step 3: Cross multiply
    1,417.71x = 2,127.00 × 724.87
  4. Step 4: Simplify right side
    1,417.71x = 1,541,795.70
  5. Step 5: Solve for x
    x = 1,541,795.70/1,417.71
  6. Step 6: Final answer
    x = 1,087.52

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.