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Finding the Fourth Proportional to 425,895.50, 638,951.25 and 159,656.78

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Solution

The fourth proportional to 425,895.50, 638,951.25 and 159,656.78 is: 239,525.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    425,895.50 : 638,951.25 = 159,656.78 : x
  2. Step 2: Convert to fraction form
    425,895.50/638,951.25 = 159,656.78/x
  3. Step 3: Cross multiply
    425,895.50x = 638,951.25 × 159,656.78
  4. Step 4: Simplify right side
    425,895.50x = 102,012,899,151.98
  5. Step 5: Solve for x
    x = 102,012,899,151.98/425,895.50
  6. Step 6: Final answer
    x = 239,525.66

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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.