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Finding the Fourth Proportional to 752.52, 1,127.68 and 477.74

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Solution

The fourth proportional to 752.52, 1,127.68 and 477.74 is: 715.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    752.52 : 1,127.68 = 477.74 : x
  2. Step 2: Convert to fraction form
    752.52/1,127.68 = 477.74/x
  3. Step 3: Cross multiply
    752.52x = 1,127.68 × 477.74
  4. Step 4: Simplify right side
    752.52x = 538,737.84
  5. Step 5: Solve for x
    x = 538,737.84/752.52
  6. Step 6: Final answer
    x = 715.91

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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.