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Finding the Fourth Proportional to 381,375.50, 571,664.07 and 128,568.62

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Solution

The fourth proportional to 381,375.50, 571,664.07 and 128,568.62 is: 192,718.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    381,375.50 : 571,664.07 = 128,568.62 : x
  2. Step 2: Convert to fraction form
    381,375.50/571,664.07 = 128,568.62/x
  3. Step 3: Cross multiply
    381,375.50x = 571,664.07 × 128,568.62
  4. Step 4: Simplify right side
    381,375.50x = 73,498,060,583.48
  5. Step 5: Solve for x
    x = 73,498,060,583.48/381,375.50
  6. Step 6: Final answer
    x = 192,718.36

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1.5x scale

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.