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Finding the Fourth Proportional to 275.25, 379.94 and 197.85

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Solution

The fourth proportional to 275.25, 379.94 and 197.85 is: 273.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    275.25 : 379.94 = 197.85 : x
  2. Step 2: Convert to fraction form
    275.25/379.94 = 197.85/x
  3. Step 3: Cross multiply
    275.25x = 379.94 × 197.85
  4. Step 4: Simplify right side
    275.25x = 75,170.14
  5. Step 5: Solve for x
    x = 75,170.14/275.25
  6. Step 6: Final answer
    x = 273.10

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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.