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Finding the Fourth Proportional to 230.92, 346.38 and 86.56

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Solution

The fourth proportional to 230.92, 346.38 and 86.56 is: 129.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    230.92 : 346.38 = 86.56 : x
  2. Step 2: Convert to fraction form
    230.92/346.38 = 86.56/x
  3. Step 3: Cross multiply
    230.92x = 346.38 × 86.56
  4. Step 4: Simplify right side
    230.92x = 29,982.65
  5. Step 5: Solve for x
    x = 29,982.65/230.92
  6. Step 6: Final answer
    x = 129.84

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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.