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Finding the Fourth Proportional to 275.39, 380.18 and 216.41

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Solution

The fourth proportional to 275.39, 380.18 and 216.41 is: 298.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    275.39 : 380.18 = 216.41 : x
  2. Step 2: Convert to fraction form
    275.39/380.18 = 216.41/x
  3. Step 3: Cross multiply
    275.39x = 380.18 × 216.41
  4. Step 4: Simplify right side
    275.39x = 82,273.67
  5. Step 5: Solve for x
    x = 82,273.67/275.39
  6. Step 6: Final answer
    x = 298.76

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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.