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Finding the Fourth Proportional to 425,914.88, 638,685.20 and 159,488.49

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Solution

The fourth proportional to 425,914.88, 638,685.20 and 159,488.49 is: 239,162.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    425,914.88 : 638,685.20 = 159,488.49 : x
  2. Step 2: Convert to fraction form
    425,914.88/638,685.20 = 159,488.49/x
  3. Step 3: Cross multiply
    425,914.88x = 638,685.20 × 159,488.49
  4. Step 4: Simplify right side
    425,914.88x = 101,862,940,927.14
  5. Step 5: Solve for x
    x = 101,862,940,927.14/425,914.88
  6. Step 6: Final answer
    x = 239,162.68

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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.