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Finding the Fourth Proportional to 396,687.48, 547,425.72 and 215,395.92

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Solution

The fourth proportional to 396,687.48, 547,425.72 and 215,395.92 is: 297,244.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    396,687.48 : 547,425.72 = 215,395.92 : x
  2. Step 2: Convert to fraction form
    396,687.48/547,425.72 = 215,395.92/x
  3. Step 3: Cross multiply
    396,687.48x = 547,425.72 × 215,395.92
  4. Step 4: Simplify right side
    396,687.48x = 117,913,266,591.06
  5. Step 5: Solve for x
    x = 117,913,266,591.06/396,687.48
  6. Step 6: Final answer
    x = 297,244.74

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1.5x scale

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.