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Finding the Fourth Proportional to 396,419.97, 547,059.93 and 215,131.93

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Solution

The fourth proportional to 396,419.97, 547,059.93 and 215,131.93 is: 296,882.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    396,419.97 : 547,059.93 = 215,131.93 : x
  2. Step 2: Convert to fraction form
    396,419.97/547,059.93 = 215,131.93/x
  3. Step 3: Cross multiply
    396,419.97x = 547,059.93 × 215,131.93
  4. Step 4: Simplify right side
    396,419.97x = 117,690,059,469.38
  5. Step 5: Solve for x
    x = 117,690,059,469.38/396,419.97
  6. Step 6: Final answer
    x = 296,882.26

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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.