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Finding the Fourth Proportional to 269.22, 403.95 and 115.18

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Solution

The fourth proportional to 269.22, 403.95 and 115.18 is: 172.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    269.22 : 403.95 = 115.18 : x
  2. Step 2: Convert to fraction form
    269.22/403.95 = 115.18/x
  3. Step 3: Cross multiply
    269.22x = 403.95 × 115.18
  4. Step 4: Simplify right side
    269.22x = 46,526.39
  5. Step 5: Solve for x
    x = 46,526.39/269.22
  6. Step 6: Final answer
    x = 172.82

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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.