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Finding the Fourth Proportional to 381,260.10, 571,491.11 and 128,453.25

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Solution

The fourth proportional to 381,260.10, 571,491.11 and 128,453.25 is: 192,545.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    381,260.10 : 571,491.11 = 128,453.25 : x
  2. Step 2: Convert to fraction form
    381,260.10/571,491.11 = 128,453.25/x
  3. Step 3: Cross multiply
    381,260.10x = 571,491.11 × 128,453.25
  4. Step 4: Simplify right side
    381,260.10x = 73,409,890,425.61
  5. Step 5: Solve for x
    x = 73,409,890,425.61/381,260.10
  6. Step 6: Final answer
    x = 192,545.43

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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.