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Finding the Fourth Proportional to 425,919.87, 638,704.71 and 159,543.27

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Solution

The fourth proportional to 425,919.87, 638,704.71 and 159,543.27 is: 239,249.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    425,919.87 : 638,704.71 = 159,543.27 : x
  2. Step 2: Convert to fraction form
    425,919.87/638,704.71 = 159,543.27/x
  3. Step 3: Cross multiply
    425,919.87x = 638,704.71 × 159,543.27
  4. Step 4: Simplify right side
    425,919.87x = 101,901,037,997.80
  5. Step 5: Solve for x
    x = 101,901,037,997.80/425,919.87
  6. Step 6: Final answer
    x = 239,249.32

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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.