Home / 521,468,920.20-782,203,380.30-198,310,801.80

Finding the Fourth Proportional to 521,468,920.20, 782,203,380.30 and 198,310,801.80

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Solution

The fourth proportional to 521,468,920.20, 782,203,380.30 and 198,310,801.80 is: 297,466,202.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    521,468,920.20 : 782,203,380.30 = 198,310,801.80 : x
  2. Step 2: Convert to fraction form
    521,468,920.20/782,203,380.30 = 198,310,801.80/x
  3. Step 3: Cross multiply
    521,468,920.20x = 782,203,380.30 × 198,310,801.80
  4. Step 4: Simplify right side
    521,468,920.20x = 155,119,379,517,963,328
  5. Step 5: Solve for x
    x = 155,119,379,517,963,328/521,468,920.20
  6. Step 6: Final answer
    x = 297,466,202.70

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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.