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Finding the Fourth Proportional to 372.96, 514.80 and 225.76

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Solution

The fourth proportional to 372.96, 514.80 and 225.76 is: 311.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    372.96 : 514.80 = 225.76 : x
  2. Step 2: Convert to fraction form
    372.96/514.80 = 225.76/x
  3. Step 3: Cross multiply
    372.96x = 514.80 × 225.76
  4. Step 4: Simplify right side
    372.96x = 116,221.25
  5. Step 5: Solve for x
    x = 116,221.25/372.96
  6. Step 6: Final answer
    x = 311.62

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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.