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Finding the Fourth Proportional to 396,793.16, 547,578.51 and 215,508.63

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Solution

The fourth proportional to 396,793.16, 547,578.51 and 215,508.63 is: 297,404.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    396,793.16 : 547,578.51 = 215,508.63 : x
  2. Step 2: Convert to fraction form
    396,793.16/547,578.51 = 215,508.63/x
  3. Step 3: Cross multiply
    396,793.16x = 547,578.51 × 215,508.63
  4. Step 4: Simplify right side
    396,793.16x = 118,007,894,507.54
  5. Step 5: Solve for x
    x = 118,007,894,507.54/396,793.16
  6. Step 6: Final answer
    x = 297,404.05

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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.