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Finding the Fourth Proportional to 425,641.47, 638,464.52 and 126,124.64

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Solution

The fourth proportional to 425,641.47, 638,464.52 and 126,124.64 is: 189,187.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    425,641.47 : 638,464.52 = 126,124.64 : x
  2. Step 2: Convert to fraction form
    425,641.47/638,464.52 = 126,124.64/x
  3. Step 3: Cross multiply
    425,641.47x = 638,464.52 × 126,124.64
  4. Step 4: Simplify right side
    425,641.47x = 80,526,107,737.77
  5. Step 5: Solve for x
    x = 80,526,107,737.77/425,641.47
  6. Step 6: Final answer
    x = 189,187.65

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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.