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Finding the Fourth Proportional to 273.38, 409.80 and 191.96

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Solution

The fourth proportional to 273.38, 409.80 and 191.96 is: 287.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    273.38 : 409.80 = 191.96 : x
  2. Step 2: Convert to fraction form
    273.38/409.80 = 191.96/x
  3. Step 3: Cross multiply
    273.38x = 409.80 × 191.96
  4. Step 4: Simplify right side
    273.38x = 78,665.21
  5. Step 5: Solve for x
    x = 78,665.21/273.38
  6. Step 6: Final answer
    x = 287.75

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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.