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Finding the Fourth Proportional to 279.24, 388.43 and 273.96

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Solution

The fourth proportional to 279.24, 388.43 and 273.96 is: 381.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    279.24 : 388.43 = 273.96 : x
  2. Step 2: Convert to fraction form
    279.24/388.43 = 273.96/x
  3. Step 3: Cross multiply
    279.24x = 388.43 × 273.96
  4. Step 4: Simplify right side
    279.24x = 106,414.28
  5. Step 5: Solve for x
    x = 106,414.28/279.24
  6. Step 6: Final answer
    x = 381.09

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.