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Finding the Fourth Proportional to 269.21, 403.73 and 115.13

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Solution

The fourth proportional to 269.21, 403.73 and 115.13 is: 172.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    269.21 : 403.73 = 115.13 : x
  2. Step 2: Convert to fraction form
    269.21/403.73 = 115.13/x
  3. Step 3: Cross multiply
    269.21x = 403.73 × 115.13
  4. Step 4: Simplify right side
    269.21x = 46,481.43
  5. Step 5: Solve for x
    x = 46,481.43/269.21
  6. Step 6: Final answer
    x = 172.66

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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.