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Finding the Fourth Proportional to 381,249.96, 571,879.05 and 115,012.78

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Solution

The fourth proportional to 381,249.96, 571,879.05 and 115,012.78 is: 172,520.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    381,249.96 : 571,879.05 = 115,012.78 : x
  2. Step 2: Convert to fraction form
    381,249.96/571,879.05 = 115,012.78/x
  3. Step 3: Cross multiply
    381,249.96x = 571,879.05 × 115,012.78
  4. Step 4: Simplify right side
    381,249.96x = 65,773,398,789.20
  5. Step 5: Solve for x
    x = 65,773,398,789.20/381,249.96
  6. Step 6: Final answer
    x = 172,520.41

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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.