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Finding the Fourth Proportional to 230.27, 317.72 and 142.88

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Solution

The fourth proportional to 230.27, 317.72 and 142.88 is: 197.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    230.27 : 317.72 = 142.88 : x
  2. Step 2: Convert to fraction form
    230.27/317.72 = 142.88/x
  3. Step 3: Cross multiply
    230.27x = 317.72 × 142.88
  4. Step 4: Simplify right side
    230.27x = 45,394.60
  5. Step 5: Solve for x
    x = 45,394.60/230.27
  6. Step 6: Final answer
    x = 197.14

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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.