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Finding the Fourth Proportional to 230.90, 318.28 and 168.74

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Solution

The fourth proportional to 230.90, 318.28 and 168.74 is: 232.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    230.90 : 318.28 = 168.74 : x
  2. Step 2: Convert to fraction form
    230.90/318.28 = 168.74/x
  3. Step 3: Cross multiply
    230.90x = 318.28 × 168.74
  4. Step 4: Simplify right side
    230.90x = 53,704.13
  5. Step 5: Solve for x
    x = 53,704.13/230.90
  6. Step 6: Final answer
    x = 232.59

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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.