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Finding the Fourth Proportional to 396,499.60, 547,170.01 and 215,211.57

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Solution

The fourth proportional to 396,499.60, 547,170.01 and 215,211.57 is: 296,992.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    396,499.60 : 547,170.01 = 215,211.57 : x
  2. Step 2: Convert to fraction form
    396,499.60/547,170.01 = 215,211.57/x
  3. Step 3: Cross multiply
    396,499.60x = 547,170.01 × 215,211.57
  4. Step 4: Simplify right side
    396,499.60x = 117,757,318,935.85
  5. Step 5: Solve for x
    x = 117,757,318,935.85/396,499.60
  6. Step 6: Final answer
    x = 296,992.27

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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.