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Finding the Fourth Proportional to 269.22, 406.44 and 267.78

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Solution

The fourth proportional to 269.22, 406.44 and 267.78 is: 404.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    269.22 : 406.44 = 267.78 : x
  2. Step 2: Convert to fraction form
    269.22/406.44 = 267.78/x
  3. Step 3: Cross multiply
    269.22x = 406.44 × 267.78
  4. Step 4: Simplify right side
    269.22x = 108,835.16
  5. Step 5: Solve for x
    x = 108,835.16/269.22
  6. Step 6: Final answer
    x = 404.26

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.