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Finding the Fourth Proportional to 486,760.61, 730,141.46 and 126,931.13

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Solution

The fourth proportional to 486,760.61, 730,141.46 and 126,931.13 is: 190,396.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    486,760.61 : 730,141.46 = 126,931.13 : x
  2. Step 2: Convert to fraction form
    486,760.61/730,141.46 = 126,931.13/x
  3. Step 3: Cross multiply
    486,760.61x = 730,141.46 × 126,931.13
  4. Step 4: Simplify right side
    486,760.61x = 92,677,676,292.29
  5. Step 5: Solve for x
    x = 92,677,676,292.29/486,760.61
  6. Step 6: Final answer
    x = 190,396.83

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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.