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Finding the Fourth Proportional to 481.19, 721.79 and 156.56

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Solution

The fourth proportional to 481.19, 721.79 and 156.56 is: 234.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    481.19 : 721.79 = 156.56 : x
  2. Step 2: Convert to fraction form
    481.19/721.79 = 156.56/x
  3. Step 3: Cross multiply
    481.19x = 721.79 × 156.56
  4. Step 4: Simplify right side
    481.19x = 112,999.05
  5. Step 5: Solve for x
    x = 112,999.05/481.19
  6. Step 6: Final answer
    x = 234.83

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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.