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Finding the Fourth Proportional to 163.31, 225.32 and 143.82

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Solution

The fourth proportional to 163.31, 225.32 and 143.82 is: 198.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    163.31 : 225.32 = 143.82 : x
  2. Step 2: Convert to fraction form
    163.31/225.32 = 143.82/x
  3. Step 3: Cross multiply
    163.31x = 225.32 × 143.82
  4. Step 4: Simplify right side
    163.31x = 32,404.80
  5. Step 5: Solve for x
    x = 32,404.80/163.31
  6. Step 6: Final answer
    x = 198.43

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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.