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Finding the Fourth Proportional to 234.88, 324.20 and 136.68

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Solution

The fourth proportional to 234.88, 324.20 and 136.68 is: 188.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    234.88 : 324.20 = 136.68 : x
  2. Step 2: Convert to fraction form
    234.88/324.20 = 136.68/x
  3. Step 3: Cross multiply
    234.88x = 324.20 × 136.68
  4. Step 4: Simplify right side
    234.88x = 44,311.66
  5. Step 5: Solve for x
    x = 44,311.66/234.88
  6. Step 6: Final answer
    x = 188.66

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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.