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Finding the Fourth Proportional to 299.54, 449.23 and 171.22

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Solution

The fourth proportional to 299.54, 449.23 and 171.22 is: 256.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    299.54 : 449.23 = 171.22 : x
  2. Step 2: Convert to fraction form
    299.54/449.23 = 171.22/x
  3. Step 3: Cross multiply
    299.54x = 449.23 × 171.22
  4. Step 4: Simplify right side
    299.54x = 76,917.16
  5. Step 5: Solve for x
    x = 76,917.16/299.54
  6. Step 6: Final answer
    x = 256.78

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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.