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Finding the Fourth Proportional to 230.31, 345.26 and 108.61

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Solution

The fourth proportional to 230.31, 345.26 and 108.61 is: 162.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    230.31 : 345.26 = 108.61 : x
  2. Step 2: Convert to fraction form
    230.31/345.26 = 108.61/x
  3. Step 3: Cross multiply
    230.31x = 345.26 × 108.61
  4. Step 4: Simplify right side
    230.31x = 37,498.10
  5. Step 5: Solve for x
    x = 37,498.10/230.31
  6. Step 6: Final answer
    x = 162.82

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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.