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Finding the Fourth Proportional to 425,576.88, 638,458.68 and 126,080.87

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Solution

The fourth proportional to 425,576.88, 638,458.68 and 126,080.87 is: 189,148.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    425,576.88 : 638,458.68 = 126,080.87 : x
  2. Step 2: Convert to fraction form
    425,576.88/638,458.68 = 126,080.87/x
  3. Step 3: Cross multiply
    425,576.88x = 638,458.68 × 126,080.87
  4. Step 4: Simplify right side
    425,576.88x = 80,497,422,641.16
  5. Step 5: Solve for x
    x = 80,497,422,641.16/425,576.88
  6. Step 6: Final answer
    x = 189,148.96

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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.