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Finding the Fourth Proportional to 372.11, 513.62 and 216.89

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Solution

The fourth proportional to 372.11, 513.62 and 216.89 is: 299.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    372.11 : 513.62 = 216.89 : x
  2. Step 2: Convert to fraction form
    372.11/513.62 = 216.89/x
  3. Step 3: Cross multiply
    372.11x = 513.62 × 216.89
  4. Step 4: Simplify right side
    372.11x = 111,397.96
  5. Step 5: Solve for x
    x = 111,397.96/372.11
  6. Step 6: Final answer
    x = 299.37

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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.