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Finding the Fourth Proportional to 861,229.72, 1,188,488.46 and 479,249.92

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Solution

The fourth proportional to 861,229.72, 1,188,488.46 and 479,249.92 is: 661,360.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    861,229.72 : 1,188,488.46 = 479,249.92 : x
  2. Step 2: Convert to fraction form
    861,229.72/1,188,488.46 = 479,249.92/x
  3. Step 3: Cross multiply
    861,229.72x = 1,188,488.46 × 479,249.92
  4. Step 4: Simplify right side
    861,229.72x = 569,582,999,375.92
  5. Step 5: Solve for x
    x = 569,582,999,375.92/861,229.72
  6. Step 6: Final answer
    x = 661,360.13

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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.