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Finding the Fourth Proportional to 275.50, 379.69 and 213.23

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Solution

The fourth proportional to 275.50, 379.69 and 213.23 is: 293.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    275.50 : 379.69 = 213.23 : x
  2. Step 2: Convert to fraction form
    275.50/379.69 = 213.23/x
  3. Step 3: Cross multiply
    275.50x = 379.69 × 213.23
  4. Step 4: Simplify right side
    275.50x = 80,961.71
  5. Step 5: Solve for x
    x = 80,961.71/275.50
  6. Step 6: Final answer
    x = 293.87

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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.