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Finding the Fourth Proportional to 425,975.75, 638,854.27 and 126,385.45

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Solution

The fourth proportional to 425,975.75, 638,854.27 and 126,385.45 is: 189,545.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    425,975.75 : 638,854.27 = 126,385.45 : x
  2. Step 2: Convert to fraction form
    425,975.75/638,854.27 = 126,385.45/x
  3. Step 3: Cross multiply
    425,975.75x = 638,854.27 × 126,385.45
  4. Step 4: Simplify right side
    425,975.75x = 80,741,884,398.37
  5. Step 5: Solve for x
    x = 80,741,884,398.37/425,975.75
  6. Step 6: Final answer
    x = 189,545.73

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1.5x scale

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.