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Finding the Fourth Proportional to 396,379.91, 547,001.51 and 215,087.23

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Solution

The fourth proportional to 396,379.91, 547,001.51 and 215,087.23 is: 296,818.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    396,379.91 : 547,001.51 = 215,087.23 : x
  2. Step 2: Convert to fraction form
    396,379.91/547,001.51 = 215,087.23/x
  3. Step 3: Cross multiply
    396,379.91x = 547,001.51 × 215,087.23
  4. Step 4: Simplify right side
    396,379.91x = 117,653,039,200.03
  5. Step 5: Solve for x
    x = 117,653,039,200.03/396,379.91
  6. Step 6: Final answer
    x = 296,818.87

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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.