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Finding the Fourth Proportional to 273.13, 408.67 and 221.88

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Solution

The fourth proportional to 273.13, 408.67 and 221.88 is: 331.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    273.13 : 408.67 = 221.88 : x
  2. Step 2: Convert to fraction form
    273.13/408.67 = 221.88/x
  3. Step 3: Cross multiply
    273.13x = 408.67 × 221.88
  4. Step 4: Simplify right side
    273.13x = 90,675.70
  5. Step 5: Solve for x
    x = 90,675.70/273.13
  6. Step 6: Final answer
    x = 331.99

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.