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Finding the Fourth Proportional to 391,572.30, 587,358.45 and 291,927.12

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Solution

The fourth proportional to 391,572.30, 587,358.45 and 291,927.12 is: 437,890.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,572.30 : 587,358.45 = 291,927.12 : x
  2. Step 2: Convert to fraction form
    391,572.30/587,358.45 = 291,927.12/x
  3. Step 3: Cross multiply
    391,572.30x = 587,358.45 × 291,927.12
  4. Step 4: Simplify right side
    391,572.30x = 171,465,860,716.16
  5. Step 5: Solve for x
    x = 171,465,860,716.16/391,572.30
  6. Step 6: Final answer
    x = 437,890.68

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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.