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Finding the Fourth Proportional to 486,179.91, 729,264.00 and 126,318.91

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Solution

The fourth proportional to 486,179.91, 729,264.00 and 126,318.91 is: 189,476.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    486,179.91 : 729,264.00 = 126,318.91 : x
  2. Step 2: Convert to fraction form
    486,179.91/729,264.00 = 126,318.91/x
  3. Step 3: Cross multiply
    486,179.91x = 729,264.00 × 126,318.91
  4. Step 4: Simplify right side
    486,179.91x = 92,119,835,788.55
  5. Step 5: Solve for x
    x = 92,119,835,788.55/486,179.91
  6. Step 6: Final answer
    x = 189,476.85

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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.