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Finding the Fourth Proportional to 488,387.80, 731,609.70 and 429,938.20

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Solution

The fourth proportional to 488,387.80, 731,609.70 and 429,938.20 is: 644,051.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    488,387.80 : 731,609.70 = 429,938.20 : x
  2. Step 2: Convert to fraction form
    488,387.80/731,609.70 = 429,938.20/x
  3. Step 3: Cross multiply
    488,387.80x = 731,609.70 × 429,938.20
  4. Step 4: Simplify right side
    488,387.80x = 314,546,957,520.54
  5. Step 5: Solve for x
    x = 314,546,957,520.54/488,387.80
  6. Step 6: Final answer
    x = 644,051.63

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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.