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Finding the Fourth Proportional to 375.30, 517.90 and 217.92

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Solution

The fourth proportional to 375.30, 517.90 and 217.92 is: 300.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    375.30 : 517.90 = 217.92 : x
  2. Step 2: Convert to fraction form
    375.30/517.90 = 217.92/x
  3. Step 3: Cross multiply
    375.30x = 517.90 × 217.92
  4. Step 4: Simplify right side
    375.30x = 112,860.77
  5. Step 5: Solve for x
    x = 112,860.77/375.30
  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.