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Finding the Fourth Proportional to 269.16, 403.80 and 165.16

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Solution

The fourth proportional to 269.16, 403.80 and 165.16 is: 247.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    269.16 : 403.80 = 165.16 : x
  2. Step 2: Convert to fraction form
    269.16/403.80 = 165.16/x
  3. Step 3: Cross multiply
    269.16x = 403.80 × 165.16
  4. Step 4: Simplify right side
    269.16x = 66,691.61
  5. Step 5: Solve for x
    x = 66,691.61/269.16
  6. Step 6: Final answer
    x = 247.78

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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.