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Finding the Fourth Proportional to 372.80, 514.50 and 225.42

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Solution

The fourth proportional to 372.80, 514.50 and 225.42 is: 311.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    372.80 : 514.50 = 225.42 : x
  2. Step 2: Convert to fraction form
    372.80/514.50 = 225.42/x
  3. Step 3: Cross multiply
    372.80x = 514.50 × 225.42
  4. Step 4: Simplify right side
    372.80x = 115,979.67
  5. Step 5: Solve for x
    x = 115,979.67/372.80
  6. Step 6: Final answer
    x = 311.11

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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.