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Finding the Fourth Proportional to 425,859, 638,896.50 and 159,620.28

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Solution

The fourth proportional to 425,859, 638,896.50 and 159,620.28 is: 239,470.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    425,859 : 638,896.50 = 159,620.28 : x
  2. Step 2: Convert to fraction form
    425,859/638,896.50 = 159,620.28/x
  3. Step 3: Cross multiply
    425,859x = 638,896.50 × 159,620.28
  4. Step 4: Simplify right side
    425,859x = 101,980,838,221.02
  5. Step 5: Solve for x
    x = 101,980,838,221.02/425,859
  6. Step 6: Final answer
    x = 239,470.90

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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.