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Finding the Fourth Proportional to 372.15, 513.57 and 224.79

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Solution

The fourth proportional to 372.15, 513.57 and 224.79 is: 310.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    372.15 : 513.57 = 224.79 : x
  2. Step 2: Convert to fraction form
    372.15/513.57 = 224.79/x
  3. Step 3: Cross multiply
    372.15x = 513.57 × 224.79
  4. Step 4: Simplify right side
    372.15x = 115,445.40
  5. Step 5: Solve for x
    x = 115,445.40/372.15
  6. Step 6: Final answer
    x = 310.21

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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.