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Finding the Fourth Proportional to 396,691.56, 547,440.93 and 215,403.84

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Solution

The fourth proportional to 396,691.56, 547,440.93 and 215,403.84 is: 297,260.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    396,691.56 : 547,440.93 = 215,403.84 : x
  2. Step 2: Convert to fraction form
    396,691.56/547,440.93 = 215,403.84/x
  3. Step 3: Cross multiply
    396,691.56x = 547,440.93 × 215,403.84
  4. Step 4: Simplify right side
    396,691.56x = 117,920,878,495.17
  5. Step 5: Solve for x
    x = 117,920,878,495.17/396,691.56
  6. Step 6: Final answer
    x = 297,260.87

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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.