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Finding the Fourth Proportional to 372.10, 513.49 and 216.85

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Solution

The fourth proportional to 372.10, 513.49 and 216.85 is: 299.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    372.10 : 513.49 = 216.85 : x
  2. Step 2: Convert to fraction form
    372.10/513.49 = 216.85/x
  3. Step 3: Cross multiply
    372.10x = 513.49 × 216.85
  4. Step 4: Simplify right side
    372.10x = 111,348.48
  5. Step 5: Solve for x
    x = 111,348.48/372.10
  6. Step 6: Final answer
    x = 299.25

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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.