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Finding the Fourth Proportional to 198.65, 273.51 and 163.57

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Solution

The fourth proportional to 198.65, 273.51 and 163.57 is: 225.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    198.65 : 273.51 = 163.57 : x
  2. Step 2: Convert to fraction form
    198.65/273.51 = 163.57/x
  3. Step 3: Cross multiply
    198.65x = 273.51 × 163.57
  4. Step 4: Simplify right side
    198.65x = 44,737.96
  5. Step 5: Solve for x
    x = 44,737.96/198.65
  6. Step 6: Final answer
    x = 225.21

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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.