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Finding the Fourth Proportional to 1,229.29, 1,842.78 and 449.11

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Solution

The fourth proportional to 1,229.29, 1,842.78 and 449.11 is: 673.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,229.29 : 1,842.78 = 449.11 : x
  2. Step 2: Convert to fraction form
    1,229.29/1,842.78 = 449.11/x
  3. Step 3: Cross multiply
    1,229.29x = 1,842.78 × 449.11
  4. Step 4: Simplify right side
    1,229.29x = 827,610.93
  5. Step 5: Solve for x
    x = 827,610.93/1,229.29
  6. Step 6: Final answer
    x = 673.24

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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.