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Finding the Fourth Proportional to 424,272.20, 636,408.30 and 329,793.80

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Solution

The fourth proportional to 424,272.20, 636,408.30 and 329,793.80 is: 494,690.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    424,272.20 : 636,408.30 = 329,793.80 : x
  2. Step 2: Convert to fraction form
    424,272.20/636,408.30 = 329,793.80/x
  3. Step 3: Cross multiply
    424,272.20x = 636,408.30 × 329,793.80
  4. Step 4: Simplify right side
    424,272.20x = 209,883,511,608.54
  5. Step 5: Solve for x
    x = 209,883,511,608.54/424,272.20
  6. Step 6: Final answer
    x = 494,690.70

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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.