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Finding the Fourth Proportional to 285,965,793.90, 428,948,690.85 and 285,965,793.90

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Solution

The fourth proportional to 285,965,793.90, 428,948,690.85 and 285,965,793.90 is: 428,948,690.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    285,965,793.90 : 428,948,690.85 = 285,965,793.90 : x
  2. Step 2: Convert to fraction form
    285,965,793.90/428,948,690.85 = 285,965,793.90/x
  3. Step 3: Cross multiply
    285,965,793.90x = 428,948,690.85 × 285,965,793.90
  4. Step 4: Simplify right side
    285,965,793.90x = 122,664,652,921,285,920
  5. Step 5: Solve for x
    x = 122,664,652,921,285,920/285,965,793.90
  6. Step 6: Final answer
    x = 428,948,690.85

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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.