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Finding the Fourth Proportional to 425,601.32, 638,495.28 and 126,105.44

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Solution

The fourth proportional to 425,601.32, 638,495.28 and 126,105.44 is: 189,185.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    425,601.32 : 638,495.28 = 126,105.44 : x
  2. Step 2: Convert to fraction form
    425,601.32/638,495.28 = 126,105.44/x
  3. Step 3: Cross multiply
    425,601.32x = 638,495.28 × 126,105.44
  4. Step 4: Simplify right side
    425,601.32x = 80,517,728,222.32
  5. Step 5: Solve for x
    x = 80,517,728,222.32/425,601.32
  6. Step 6: Final answer
    x = 189,185.80

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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.