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Finding the Fourth Proportional to 230.59, 318.12 and 143.23

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Solution

The fourth proportional to 230.59, 318.12 and 143.23 is: 197.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    230.59 : 318.12 = 143.23 : x
  2. Step 2: Convert to fraction form
    230.59/318.12 = 143.23/x
  3. Step 3: Cross multiply
    230.59x = 318.12 × 143.23
  4. Step 4: Simplify right side
    230.59x = 45,564.33
  5. Step 5: Solve for x
    x = 45,564.33/230.59
  6. Step 6: Final answer
    x = 197.60

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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.