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Finding the Fourth Proportional to 481.21, 721.92 and 156.58

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Solution

The fourth proportional to 481.21, 721.92 and 156.58 is: 234.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    481.21 : 721.92 = 156.58 : x
  2. Step 2: Convert to fraction form
    481.21/721.92 = 156.58/x
  3. Step 3: Cross multiply
    481.21x = 721.92 × 156.58
  4. Step 4: Simplify right side
    481.21x = 113,038.23
  5. Step 5: Solve for x
    x = 113,038.23/481.21
  6. Step 6: Final answer
    x = 234.90

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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.