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Finding the Fourth Proportional to 330.76, 456.53 and 225.89

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Solution

The fourth proportional to 330.76, 456.53 and 225.89 is: 311.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    330.76 : 456.53 = 225.89 : x
  2. Step 2: Convert to fraction form
    330.76/456.53 = 225.89/x
  3. Step 3: Cross multiply
    330.76x = 456.53 × 225.89
  4. Step 4: Simplify right side
    330.76x = 103,124.97
  5. Step 5: Solve for x
    x = 103,124.97/330.76
  6. Step 6: Final answer
    x = 311.78

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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.