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Finding the Fourth Proportional to 681.99, 1,023.27 and 271.11

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Solution

The fourth proportional to 681.99, 1,023.27 and 271.11 is: 406.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    681.99 : 1,023.27 = 271.11 : x
  2. Step 2: Convert to fraction form
    681.99/1,023.27 = 271.11/x
  3. Step 3: Cross multiply
    681.99x = 1,023.27 × 271.11
  4. Step 4: Simplify right side
    681.99x = 277,418.73
  5. Step 5: Solve for x
    x = 277,418.73/681.99
  6. Step 6: Final answer
    x = 406.78

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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.