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Finding the Fourth Proportional to 275.12, 379.56 and 170.18

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Solution

The fourth proportional to 275.12, 379.56 and 170.18 is: 234.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    275.12 : 379.56 = 170.18 : x
  2. Step 2: Convert to fraction form
    275.12/379.56 = 170.18/x
  3. Step 3: Cross multiply
    275.12x = 379.56 × 170.18
  4. Step 4: Simplify right side
    275.12x = 64,593.52
  5. Step 5: Solve for x
    x = 64,593.52/275.12
  6. Step 6: Final answer
    x = 234.78

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.