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Finding the Fourth Proportional to 230.54, 318.08 and 143.15

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Solution

The fourth proportional to 230.54, 318.08 and 143.15 is: 197.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    230.54 : 318.08 = 143.15 : x
  2. Step 2: Convert to fraction form
    230.54/318.08 = 143.15/x
  3. Step 3: Cross multiply
    230.54x = 318.08 × 143.15
  4. Step 4: Simplify right side
    230.54x = 45,531.92
  5. Step 5: Solve for x
    x = 45,531.92/230.54
  6. Step 6: Final answer
    x = 197.51

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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.