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Finding the Fourth Proportional to 391,566.60, 587,349.90 and 204,553.80

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Solution

The fourth proportional to 391,566.60, 587,349.90 and 204,553.80 is: 306,830.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,566.60 : 587,349.90 = 204,553.80 : x
  2. Step 2: Convert to fraction form
    391,566.60/587,349.90 = 204,553.80/x
  3. Step 3: Cross multiply
    391,566.60x = 587,349.90 × 204,553.80
  4. Step 4: Simplify right side
    391,566.60x = 120,144,653,974.62
  5. Step 5: Solve for x
    x = 120,144,653,974.62/391,566.60
  6. Step 6: Final answer
    x = 306,830.70

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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.