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Finding the Fourth Proportional to 234.67, 323.84 and 129.76

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Solution

The fourth proportional to 234.67, 323.84 and 129.76 is: 179.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    234.67 : 323.84 = 129.76 : x
  2. Step 2: Convert to fraction form
    234.67/323.84 = 129.76/x
  3. Step 3: Cross multiply
    234.67x = 323.84 × 129.76
  4. Step 4: Simplify right side
    234.67x = 42,022.81
  5. Step 5: Solve for x
    x = 42,022.81/234.67
  6. Step 6: Final answer
    x = 179.07

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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.