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Finding the Fourth Proportional to 481.92, 721.36 and 264.80

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Solution

The fourth proportional to 481.92, 721.36 and 264.80 is: 396.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    481.92 : 721.36 = 264.80 : x
  2. Step 2: Convert to fraction form
    481.92/721.36 = 264.80/x
  3. Step 3: Cross multiply
    481.92x = 721.36 × 264.80
  4. Step 4: Simplify right side
    481.92x = 191,016.13
  5. Step 5: Solve for x
    x = 191,016.13/481.92
  6. Step 6: Final answer
    x = 396.36

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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.