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Finding the Fourth Proportional to 481.90, 721.48 and 325.39

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Solution

The fourth proportional to 481.90, 721.48 and 325.39 is: 487.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    481.90 : 721.48 = 325.39 : x
  2. Step 2: Convert to fraction form
    481.90/721.48 = 325.39/x
  3. Step 3: Cross multiply
    481.90x = 721.48 × 325.39
  4. Step 4: Simplify right side
    481.90x = 234,764.67
  5. Step 5: Solve for x
    x = 234,764.67/481.90
  6. Step 6: Final answer
    x = 487.17

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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.