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Finding the Fourth Proportional to 481.34, 721.92 and 156.72

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Solution

The fourth proportional to 481.34, 721.92 and 156.72 is: 235.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    481.34 : 721.92 = 156.72 : x
  2. Step 2: Convert to fraction form
    481.34/721.92 = 156.72/x
  3. Step 3: Cross multiply
    481.34x = 721.92 × 156.72
  4. Step 4: Simplify right side
    481.34x = 113,139.30
  5. Step 5: Solve for x
    x = 113,139.30/481.34
  6. Step 6: Final answer
    x = 235.05

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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.