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Finding the Fourth Proportional to 237.07, 326.97 and 138.79

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Solution

The fourth proportional to 237.07, 326.97 and 138.79 is: 191.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    237.07 : 326.97 = 138.79 : x
  2. Step 2: Convert to fraction form
    237.07/326.97 = 138.79/x
  3. Step 3: Cross multiply
    237.07x = 326.97 × 138.79
  4. Step 4: Simplify right side
    237.07x = 45,380.17
  5. Step 5: Solve for x
    x = 45,380.17/237.07
  6. Step 6: Final answer
    x = 191.42

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.