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Finding the Fourth Proportional to 396,456.54, 547,104.42 and 215,168.82

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Solution

The fourth proportional to 396,456.54, 547,104.42 and 215,168.82 is: 296,929.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    396,456.54 : 547,104.42 = 215,168.82 : x
  2. Step 2: Convert to fraction form
    396,456.54/547,104.42 = 215,168.82/x
  3. Step 3: Cross multiply
    396,456.54x = 547,104.42 × 215,168.82
  4. Step 4: Simplify right side
    396,456.54x = 117,719,812,468.18
  5. Step 5: Solve for x
    x = 117,719,812,468.18/396,456.54
  6. Step 6: Final answer
    x = 296,929.93

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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.