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Finding the Fourth Proportional to 275.14, 379.41 and 212.86

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Solution

The fourth proportional to 275.14, 379.41 and 212.86 is: 293.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    275.14 : 379.41 = 212.86 : x
  2. Step 2: Convert to fraction form
    275.14/379.41 = 212.86/x
  3. Step 3: Cross multiply
    275.14x = 379.41 × 212.86
  4. Step 4: Simplify right side
    275.14x = 80,759.32
  5. Step 5: Solve for x
    x = 80,759.32/275.14
  6. Step 6: Final answer
    x = 293.53

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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.