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Finding the Fourth Proportional to 552.26, 828.11 and 321.20

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Solution

The fourth proportional to 552.26, 828.11 and 321.20 is: 481.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    552.26 : 828.11 = 321.20 : x
  2. Step 2: Convert to fraction form
    552.26/828.11 = 321.20/x
  3. Step 3: Cross multiply
    552.26x = 828.11 × 321.20
  4. Step 4: Simplify right side
    552.26x = 265,988.70
  5. Step 5: Solve for x
    x = 265,988.70/552.26
  6. Step 6: Final answer
    x = 481.63

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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.