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Finding the Fourth Proportional to 425,654.29, 638,604.75 and 126,140.59

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Solution

The fourth proportional to 425,654.29, 638,604.75 and 126,140.59 is: 189,247.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    425,654.29 : 638,604.75 = 126,140.59 : x
  2. Step 2: Convert to fraction form
    425,654.29/638,604.75 = 126,140.59/x
  3. Step 3: Cross multiply
    425,654.29x = 638,604.75 × 126,140.59
  4. Step 4: Simplify right side
    425,654.29x = 80,553,976,748.78
  5. Step 5: Solve for x
    x = 80,553,976,748.78/425,654.29
  6. Step 6: Final answer
    x = 189,247.42

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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.