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Finding the Fourth Proportional to 299.38, 449.09 and 80.04

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Solution

The fourth proportional to 299.38, 449.09 and 80.04 is: 120.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    299.38 : 449.09 = 80.04 : x
  2. Step 2: Convert to fraction form
    299.38/449.09 = 80.04/x
  3. Step 3: Cross multiply
    299.38x = 449.09 × 80.04
  4. Step 4: Simplify right side
    299.38x = 35,945.16
  5. Step 5: Solve for x
    x = 35,945.16/299.38
  6. Step 6: Final answer
    x = 120.07

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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.