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Finding the Fourth Proportional to 426,155.31, 639,065.97 and 159,770.61

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Solution

The fourth proportional to 426,155.31, 639,065.97 and 159,770.61 is: 239,593.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    426,155.31 : 639,065.97 = 159,770.61 : x
  2. Step 2: Convert to fraction form
    426,155.31/639,065.97 = 159,770.61/x
  3. Step 3: Cross multiply
    426,155.31x = 639,065.97 × 159,770.61
  4. Step 4: Simplify right side
    426,155.31x = 102,103,959,857.14
  5. Step 5: Solve for x
    x = 102,103,959,857.14/426,155.31
  6. Step 6: Final answer
    x = 239,593.31

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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.