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Finding the Fourth Proportional to 396,559.76, 547,248.66 and 215,267.78

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Solution

The fourth proportional to 396,559.76, 547,248.66 and 215,267.78 is: 297,067.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    396,559.76 : 547,248.66 = 215,267.78 : x
  2. Step 2: Convert to fraction form
    396,559.76/547,248.66 = 215,267.78/x
  3. Step 3: Cross multiply
    396,559.76x = 547,248.66 × 215,267.78
  4. Step 4: Simplify right side
    396,559.76x = 117,805,004,146.18
  5. Step 5: Solve for x
    x = 117,805,004,146.18/396,559.76
  6. Step 6: Final answer
    x = 297,067.47

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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.