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Finding the Fourth Proportional to 275.85, 380.61 and 170.94

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Solution

The fourth proportional to 275.85, 380.61 and 170.94 is: 235.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    275.85 : 380.61 = 170.94 : x
  2. Step 2: Convert to fraction form
    275.85/380.61 = 170.94/x
  3. Step 3: Cross multiply
    275.85x = 380.61 × 170.94
  4. Step 4: Simplify right side
    275.85x = 65,061.47
  5. Step 5: Solve for x
    x = 65,061.47/275.85
  6. Step 6: Final answer
    x = 235.86

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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.