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Finding the Fourth Proportional to 481.70, 721.20 and 433.10

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Solution

The fourth proportional to 481.70, 721.20 and 433.10 is: 648.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    481.70 : 721.20 = 433.10 : x
  2. Step 2: Convert to fraction form
    481.70/721.20 = 433.10/x
  3. Step 3: Cross multiply
    481.70x = 721.20 × 433.10
  4. Step 4: Simplify right side
    481.70x = 312,351.72
  5. Step 5: Solve for x
    x = 312,351.72/481.70
  6. Step 6: Final answer
    x = 648.44

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Double scale
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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.