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Finding the Fourth Proportional to 396,499.50, 547,169.86 and 215,211.47

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Solution

The fourth proportional to 396,499.50, 547,169.86 and 215,211.47 is: 296,992.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    396,499.50 : 547,169.86 = 215,211.47 : x
  2. Step 2: Convert to fraction form
    396,499.50/547,169.86 = 215,211.47/x
  3. Step 3: Cross multiply
    396,499.50x = 547,169.86 × 215,211.47
  4. Step 4: Simplify right side
    396,499.50x = 117,757,229,910.29
  5. Step 5: Solve for x
    x = 117,757,229,910.29/396,499.50
  6. Step 6: Final answer
    x = 296,992.13

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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.