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Finding the Fourth Proportional to 275.09, 411.82 and 166.55

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Solution

The fourth proportional to 275.09, 411.82 and 166.55 is: 249.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    275.09 : 411.82 = 166.55 : x
  2. Step 2: Convert to fraction form
    275.09/411.82 = 166.55/x
  3. Step 3: Cross multiply
    275.09x = 411.82 × 166.55
  4. Step 4: Simplify right side
    275.09x = 68,586.15
  5. Step 5: Solve for x
    x = 68,586.15/275.09
  6. Step 6: Final answer
    x = 249.33

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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.