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Finding the Fourth Proportional to 391,572.70, 587,359.05 and 371,355.10

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Solution

The fourth proportional to 391,572.70, 587,359.05 and 371,355.10 is: 557,032.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,572.70 : 587,359.05 = 371,355.10 : x
  2. Step 2: Convert to fraction form
    391,572.70/587,359.05 = 371,355.10/x
  3. Step 3: Cross multiply
    391,572.70x = 587,359.05 × 371,355.10
  4. Step 4: Simplify right side
    391,572.70x = 218,118,778,748.66
  5. Step 5: Solve for x
    x = 218,118,778,748.66/391,572.70
  6. Step 6: Final answer
    x = 557,032.65

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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.