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Finding the Fourth Proportional to 275.68, 380.40 and 217.44

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Solution

The fourth proportional to 275.68, 380.40 and 217.44 is: 300.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    275.68 : 380.40 = 217.44 : x
  2. Step 2: Convert to fraction form
    275.68/380.40 = 217.44/x
  3. Step 3: Cross multiply
    275.68x = 380.40 × 217.44
  4. Step 4: Simplify right side
    275.68x = 82,714.18
  5. Step 5: Solve for x
    x = 82,714.18/275.68
  6. Step 6: Final answer
    x = 300.04

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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.