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Finding the Fourth Proportional to 3,238.65, 4,469.18 and 1,979.46

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Solution

The fourth proportional to 3,238.65, 4,469.18 and 1,979.46 is: 2,731.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,238.65 : 4,469.18 = 1,979.46 : x
  2. Step 2: Convert to fraction form
    3,238.65/4,469.18 = 1,979.46/x
  3. Step 3: Cross multiply
    3,238.65x = 4,469.18 × 1,979.46
  4. Step 4: Simplify right side
    3,238.65x = 8,846,553.15
  5. Step 5: Solve for x
    x = 8,846,553.15/3,238.65
  6. Step 6: Final answer
    x = 2,731.56

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.