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Finding the Fourth Proportional to 299.42, 449.16 and 207.89

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Solution

The fourth proportional to 299.42, 449.16 and 207.89 is: 311.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    299.42 : 449.16 = 207.89 : x
  2. Step 2: Convert to fraction form
    299.42/449.16 = 207.89/x
  3. Step 3: Cross multiply
    299.42x = 449.16 × 207.89
  4. Step 4: Simplify right side
    299.42x = 93,375.87
  5. Step 5: Solve for x
    x = 93,375.87/299.42
  6. Step 6: Final answer
    x = 311.86

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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.