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Finding the Fourth Proportional to 273.92, 378 and 163.49

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Solution

The fourth proportional to 273.92, 378 and 163.49 is: 225.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    273.92 : 378 = 163.49 : x
  2. Step 2: Convert to fraction form
    273.92/378 = 163.49/x
  3. Step 3: Cross multiply
    273.92x = 378 × 163.49
  4. Step 4: Simplify right side
    273.92x = 61,797.33
  5. Step 5: Solve for x
    x = 61,797.33/273.92
  6. Step 6: Final answer
    x = 225.61

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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.