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Finding the Fourth Proportional to 486,180.91, 729,265.50 and 126,319.91

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Solution

The fourth proportional to 486,180.91, 729,265.50 and 126,319.91 is: 189,478.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    486,180.91 : 729,265.50 = 126,319.91 : x
  2. Step 2: Convert to fraction form
    486,180.91/729,265.50 = 126,319.91/x
  3. Step 3: Cross multiply
    486,180.91x = 729,265.50 × 126,319.91
  4. Step 4: Simplify right side
    486,180.91x = 92,120,752,326.11
  5. Step 5: Solve for x
    x = 92,120,752,326.11/486,180.91
  6. Step 6: Final answer
    x = 189,478.34

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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.