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Finding the Fourth Proportional to 321.52, 481.20 and 225.04

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Solution

The fourth proportional to 321.52, 481.20 and 225.04 is: 336.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    321.52 : 481.20 = 225.04 : x
  2. Step 2: Convert to fraction form
    321.52/481.20 = 225.04/x
  3. Step 3: Cross multiply
    321.52x = 481.20 × 225.04
  4. Step 4: Simplify right side
    321.52x = 108,289.25
  5. Step 5: Solve for x
    x = 108,289.25/321.52
  6. Step 6: Final answer
    x = 336.80

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.