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Finding the Fourth Proportional to 372.25, 513.71 and 217.09

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Solution

The fourth proportional to 372.25, 513.71 and 217.09 is: 299.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    372.25 : 513.71 = 217.09 : x
  2. Step 2: Convert to fraction form
    372.25/513.71 = 217.09/x
  3. Step 3: Cross multiply
    372.25x = 513.71 × 217.09
  4. Step 4: Simplify right side
    372.25x = 111,521.30
  5. Step 5: Solve for x
    x = 111,521.30/372.25
  6. Step 6: Final answer
    x = 299.59

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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.