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Finding the Fourth Proportional to 230.90, 318.38 and 165.29

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Solution

The fourth proportional to 230.90, 318.38 and 165.29 is: 227.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    230.90 : 318.38 = 165.29 : x
  2. Step 2: Convert to fraction form
    230.90/318.38 = 165.29/x
  3. Step 3: Cross multiply
    230.90x = 318.38 × 165.29
  4. Step 4: Simplify right side
    230.90x = 52,622.61
  5. Step 5: Solve for x
    x = 52,622.61/230.90
  6. Step 6: Final answer
    x = 227.91

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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.