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Finding the Fourth Proportional to 275.57, 380.21 and 170.75

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Solution

The fourth proportional to 275.57, 380.21 and 170.75 is: 235.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    275.57 : 380.21 = 170.75 : x
  2. Step 2: Convert to fraction form
    275.57/380.21 = 170.75/x
  3. Step 3: Cross multiply
    275.57x = 380.21 × 170.75
  4. Step 4: Simplify right side
    275.57x = 64,920.86
  5. Step 5: Solve for x
    x = 64,920.86/275.57
  6. Step 6: Final answer
    x = 235.59

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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.