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Finding the Fourth Proportional to 207.38, 311.33 and 126.38

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Solution

The fourth proportional to 207.38, 311.33 and 126.38 is: 189.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    207.38 : 311.33 = 126.38 : x
  2. Step 2: Convert to fraction form
    207.38/311.33 = 126.38/x
  3. Step 3: Cross multiply
    207.38x = 311.33 × 126.38
  4. Step 4: Simplify right side
    207.38x = 39,345.89
  5. Step 5: Solve for x
    x = 39,345.89/207.38
  6. Step 6: Final answer
    x = 189.73

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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.