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Finding the Fourth Proportional to 275.23, 379.56 and 201.61

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Solution

The fourth proportional to 275.23, 379.56 and 201.61 is: 278.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    275.23 : 379.56 = 201.61 : x
  2. Step 2: Convert to fraction form
    275.23/379.56 = 201.61/x
  3. Step 3: Cross multiply
    275.23x = 379.56 × 201.61
  4. Step 4: Simplify right side
    275.23x = 76,523.09
  5. Step 5: Solve for x
    x = 76,523.09/275.23
  6. Step 6: Final answer
    x = 278.03

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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.