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Finding the Fourth Proportional to 185.18, 255.29 and 163.31

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Solution

The fourth proportional to 185.18, 255.29 and 163.31 is: 225.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    185.18 : 255.29 = 163.31 : x
  2. Step 2: Convert to fraction form
    185.18/255.29 = 163.31/x
  3. Step 3: Cross multiply
    185.18x = 255.29 × 163.31
  4. Step 4: Simplify right side
    185.18x = 41,689.32
  5. Step 5: Solve for x
    x = 41,689.32/185.18
  6. Step 6: Final answer
    x = 225.13

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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.