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Finding the Fourth Proportional to 297,209.43, 445,882.11 and 128,757.78

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Solution

The fourth proportional to 297,209.43, 445,882.11 and 128,757.78 is: 193,166.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    297,209.43 : 445,882.11 = 128,757.78 : x
  2. Step 2: Convert to fraction form
    297,209.43/445,882.11 = 128,757.78/x
  3. Step 3: Cross multiply
    297,209.43x = 445,882.11 × 128,757.78
  4. Step 4: Simplify right side
    297,209.43x = 57,410,790,625.32
  5. Step 5: Solve for x
    x = 57,410,790,625.32/297,209.43
  6. Step 6: Final answer
    x = 193,166.11

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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.