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Finding the Fourth Proportional to 381,399.76, 571,871.27 and 128,674.65

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Solution

The fourth proportional to 381,399.76, 571,871.27 and 128,674.65 is: 192,934.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    381,399.76 : 571,871.27 = 128,674.65 : x
  2. Step 2: Convert to fraction form
    381,399.76/571,871.27 = 128,674.65/x
  3. Step 3: Cross multiply
    381,399.76x = 571,871.27 × 128,674.65
  4. Step 4: Simplify right side
    381,399.76x = 73,585,334,761.73
  5. Step 5: Solve for x
    x = 73,585,334,761.73/381,399.76
  6. Step 6: Final answer
    x = 192,934.93

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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.