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Finding the Fourth Proportional to 728,591.00, 1,092,978.05 and 391,167.86

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Solution

The fourth proportional to 728,591.00, 1,092,978.05 and 391,167.86 is: 586,800.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    728,591.00 : 1,092,978.05 = 391,167.86 : x
  2. Step 2: Convert to fraction form
    728,591.00/1,092,978.05 = 391,167.86/x
  3. Step 3: Cross multiply
    728,591.00x = 1,092,978.05 × 391,167.86
  4. Step 4: Simplify right side
    728,591.00x = 427,537,877,424.74
  5. Step 5: Solve for x
    x = 427,537,877,424.74/728,591.00
  6. Step 6: Final answer
    x = 586,800.94

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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.