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Finding the Fourth Proportional to 425,988.27, 638,873.01 and 126,397.98

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Solution

The fourth proportional to 425,988.27, 638,873.01 and 126,397.98 is: 189,564.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    425,988.27 : 638,873.01 = 126,397.98 : x
  2. Step 2: Convert to fraction form
    425,988.27/638,873.01 = 126,397.98/x
  3. Step 3: Cross multiply
    425,988.27x = 638,873.01 × 126,397.98
  4. Step 4: Simplify right side
    425,988.27x = 80,752,257,940.52
  5. Step 5: Solve for x
    x = 80,752,257,940.52/425,988.27
  6. Step 6: Final answer
    x = 189,564.51

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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.