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Finding the Fourth Proportional to 375.28, 517.92 and 217.90

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Solution

The fourth proportional to 375.28, 517.92 and 217.90 is: 300.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    375.28 : 517.92 = 217.90 : x
  2. Step 2: Convert to fraction form
    375.28/517.92 = 217.90/x
  3. Step 3: Cross multiply
    375.28x = 517.92 × 217.90
  4. Step 4: Simplify right side
    375.28x = 112,854.77
  5. Step 5: Solve for x
    x = 112,854.77/375.28
  6. Step 6: Final answer
    x = 300.72

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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.