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Finding the Fourth Proportional to 299.45, 449.46 and 231.71

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Solution

The fourth proportional to 299.45, 449.46 and 231.71 is: 347.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    299.45 : 449.46 = 231.71 : x
  2. Step 2: Convert to fraction form
    299.45/449.46 = 231.71/x
  3. Step 3: Cross multiply
    299.45x = 449.46 × 231.71
  4. Step 4: Simplify right side
    299.45x = 104,142.13
  5. Step 5: Solve for x
    x = 104,142.13/299.45
  6. Step 6: Final answer
    x = 347.78

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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.