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Finding the Fourth Proportional to 481.96, 721.59 and 261.79

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Solution

The fourth proportional to 481.96, 721.59 and 261.79 is: 391.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    481.96 : 721.59 = 261.79 : x
  2. Step 2: Convert to fraction form
    481.96/721.59 = 261.79/x
  3. Step 3: Cross multiply
    481.96x = 721.59 × 261.79
  4. Step 4: Simplify right side
    481.96x = 188,903.74
  5. Step 5: Solve for x
    x = 188,903.74/481.96
  6. Step 6: Final answer
    x = 391.95

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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.