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Finding the Fourth Proportional to 381,290.43, 571,939.47 and 115,053.15

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Solution

The fourth proportional to 381,290.43, 571,939.47 and 115,053.15 is: 172,580.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    381,290.43 : 571,939.47 = 115,053.15 : x
  2. Step 2: Convert to fraction form
    381,290.43/571,939.47 = 115,053.15/x
  3. Step 3: Cross multiply
    381,290.43x = 571,939.47 × 115,053.15
  4. Step 4: Simplify right side
    381,290.43x = 65,803,437,632.83
  5. Step 5: Solve for x
    x = 65,803,437,632.83/381,290.43
  6. Step 6: Final answer
    x = 172,580.88

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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.