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Finding the Fourth Proportional to 425,902, 638,961 and 159,663.28

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Solution

The fourth proportional to 425,902, 638,961 and 159,663.28 is: 239,535.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    425,902 : 638,961 = 159,663.28 : x
  2. Step 2: Convert to fraction form
    425,902/638,961 = 159,663.28/x
  3. Step 3: Cross multiply
    425,902x = 638,961 × 159,663.28
  4. Step 4: Simplify right side
    425,902x = 102,018,609,052.08
  5. Step 5: Solve for x
    x = 102,018,609,052.08/425,902
  6. Step 6: Final answer
    x = 239,535.41

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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.