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Finding the Fourth Proportional to 267.99, 402.21 and 105.79

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Solution

The fourth proportional to 267.99, 402.21 and 105.79 is: 158.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    267.99 : 402.21 = 105.79 : x
  2. Step 2: Convert to fraction form
    267.99/402.21 = 105.79/x
  3. Step 3: Cross multiply
    267.99x = 402.21 × 105.79
  4. Step 4: Simplify right side
    267.99x = 42,548.79
  5. Step 5: Solve for x
    x = 42,548.79/267.99
  6. Step 6: Final answer
    x = 158.77

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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.