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Finding the Fourth Proportional to 396,793.43, 547,578.95 and 215,508.90

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Solution

The fourth proportional to 396,793.43, 547,578.95 and 215,508.90 is: 297,404.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    396,793.43 : 547,578.95 = 215,508.90 : x
  2. Step 2: Convert to fraction form
    396,793.43/547,578.95 = 215,508.90/x
  3. Step 3: Cross multiply
    396,793.43x = 547,578.95 × 215,508.90
  4. Step 4: Simplify right side
    396,793.43x = 118,008,137,177.66
  5. Step 5: Solve for x
    x = 118,008,137,177.66/396,793.43
  6. Step 6: Final answer
    x = 297,404.46

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.