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Finding the Fourth Proportional to 682.97, 1,024.56 and 220.73

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Solution

The fourth proportional to 682.97, 1,024.56 and 220.73 is: 331.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    682.97 : 1,024.56 = 220.73 : x
  2. Step 2: Convert to fraction form
    682.97/1,024.56 = 220.73/x
  3. Step 3: Cross multiply
    682.97x = 1,024.56 × 220.73
  4. Step 4: Simplify right side
    682.97x = 226,146.01
  5. Step 5: Solve for x
    x = 226,146.01/682.97
  6. Step 6: Final answer
    x = 331.12

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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.