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Finding the Fourth Proportional to 279, 381.42 and 267.66

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Solution

The fourth proportional to 279, 381.42 and 267.66 is: 365.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    279 : 381.42 = 267.66 : x
  2. Step 2: Convert to fraction form
    279/381.42 = 267.66/x
  3. Step 3: Cross multiply
    279x = 381.42 × 267.66
  4. Step 4: Simplify right side
    279x = 102,090.88
  5. Step 5: Solve for x
    x = 102,090.88/279
  6. Step 6: Final answer
    x = 365.92

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.