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Finding the Fourth Proportional to 269.01, 402.80 and 140.49

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Solution

The fourth proportional to 269.01, 402.80 and 140.49 is: 210.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    269.01 : 402.80 = 140.49 : x
  2. Step 2: Convert to fraction form
    269.01/402.80 = 140.49/x
  3. Step 3: Cross multiply
    269.01x = 402.80 × 140.49
  4. Step 4: Simplify right side
    269.01x = 56,589.68
  5. Step 5: Solve for x
    x = 56,589.68/269.01
  6. Step 6: Final answer
    x = 210.36

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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.