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Finding the Fourth Proportional to 396,505.87, 547,163.37 and 215,213.89

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Solution

The fourth proportional to 396,505.87, 547,163.37 and 215,213.89 is: 296,987.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    396,505.87 : 547,163.37 = 215,213.89 : x
  2. Step 2: Convert to fraction form
    396,505.87/547,163.37 = 215,213.89/x
  3. Step 3: Cross multiply
    396,505.87x = 547,163.37 × 215,213.89
  4. Step 4: Simplify right side
    396,505.87x = 117,757,159,229.15
  5. Step 5: Solve for x
    x = 117,757,159,229.15/396,505.87
  6. Step 6: Final answer
    x = 296,987.18

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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.