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Finding the Fourth Proportional to 381,540.01, 571,561.79 and 221,279.27

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Solution

The fourth proportional to 381,540.01, 571,561.79 and 221,279.27 is: 331,484.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    381,540.01 : 571,561.79 = 221,279.27 : x
  2. Step 2: Convert to fraction form
    381,540.01/571,561.79 = 221,279.27/x
  3. Step 3: Cross multiply
    381,540.01x = 571,561.79 × 221,279.27
  4. Step 4: Simplify right side
    381,540.01x = 126,474,775,651.09
  5. Step 5: Solve for x
    x = 126,474,775,651.09/381,540.01
  6. Step 6: Final answer
    x = 331,484.97

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.