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Finding the Fourth Proportional to 724.92, 1,000.37 and 393.33

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Solution

The fourth proportional to 724.92, 1,000.37 and 393.33 is: 542.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    724.92 : 1,000.37 = 393.33 : x
  2. Step 2: Convert to fraction form
    724.92/1,000.37 = 393.33/x
  3. Step 3: Cross multiply
    724.92x = 1,000.37 × 393.33
  4. Step 4: Simplify right side
    724.92x = 393,475.53
  5. Step 5: Solve for x
    x = 393,475.53/724.92
  6. Step 6: Final answer
    x = 542.78

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.