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Finding the Fourth Proportional to 269.21, 371.36 and 203.60

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Solution

The fourth proportional to 269.21, 371.36 and 203.60 is: 280.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    269.21 : 371.36 = 203.60 : x
  2. Step 2: Convert to fraction form
    269.21/371.36 = 203.60/x
  3. Step 3: Cross multiply
    269.21x = 371.36 × 203.60
  4. Step 4: Simplify right side
    269.21x = 75,607.55
  5. Step 5: Solve for x
    x = 75,607.55/269.21
  6. Step 6: Final answer
    x = 280.85

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.