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Finding the Fourth Proportional to 372.39, 513.52 and 225

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Solution

The fourth proportional to 372.39, 513.52 and 225 is: 310.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    372.39 : 513.52 = 225 : x
  2. Step 2: Convert to fraction form
    372.39/513.52 = 225/x
  3. Step 3: Cross multiply
    372.39x = 513.52 × 225
  4. Step 4: Simplify right side
    372.39x = 115,542
  5. Step 5: Solve for x
    x = 115,542/372.39
  6. Step 6: Final answer
    x = 310.27

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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.