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Finding the Fourth Proportional to 230.92, 318.84 and 143.72

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Solution

The fourth proportional to 230.92, 318.84 and 143.72 is: 198.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    230.92 : 318.84 = 143.72 : x
  2. Step 2: Convert to fraction form
    230.92/318.84 = 143.72/x
  3. Step 3: Cross multiply
    230.92x = 318.84 × 143.72
  4. Step 4: Simplify right side
    230.92x = 45,823.68
  5. Step 5: Solve for x
    x = 45,823.68/230.92
  6. Step 6: Final answer
    x = 198.44

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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.