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Finding the Fourth Proportional to 481.23, 721.88 and 156.56

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Solution

The fourth proportional to 481.23, 721.88 and 156.56 is: 234.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    481.23 : 721.88 = 156.56 : x
  2. Step 2: Convert to fraction form
    481.23/721.88 = 156.56/x
  3. Step 3: Cross multiply
    481.23x = 721.88 × 156.56
  4. Step 4: Simplify right side
    481.23x = 113,013.14
  5. Step 5: Solve for x
    x = 113,013.14/481.23
  6. Step 6: Final answer
    x = 234.84

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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.