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Finding the Fourth Proportional to 425,780.73, 638,794.37 and 126,268.52

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Solution

The fourth proportional to 425,780.73, 638,794.37 and 126,268.52 is: 189,439.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    425,780.73 : 638,794.37 = 126,268.52 : x
  2. Step 2: Convert to fraction form
    425,780.73/638,794.37 = 126,268.52/x
  3. Step 3: Cross multiply
    425,780.73x = 638,794.37 × 126,268.52
  4. Step 4: Simplify right side
    425,780.73x = 80,659,615,858.92
  5. Step 5: Solve for x
    x = 80,659,615,858.92/425,780.73
  6. Step 6: Final answer
    x = 189,439.33

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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.