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Finding the Fourth Proportional to 396,505.01, 547,177.44 and 215,216.97

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Solution

The fourth proportional to 396,505.01, 547,177.44 and 215,216.97 is: 296,999.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    396,505.01 : 547,177.44 = 215,216.97 : x
  2. Step 2: Convert to fraction form
    396,505.01/547,177.44 = 215,216.97/x
  3. Step 3: Cross multiply
    396,505.01x = 547,177.44 × 215,216.97
  4. Step 4: Simplify right side
    396,505.01x = 117,761,870,689.16
  5. Step 5: Solve for x
    x = 117,761,870,689.16/396,505.01
  6. Step 6: Final answer
    x = 296,999.71

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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.