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Finding the Fourth Proportional to 1,248.22, 1,721.78 and 799.94

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Solution

The fourth proportional to 1,248.22, 1,721.78 and 799.94 is: 1,103.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,248.22 : 1,721.78 = 799.94 : x
  2. Step 2: Convert to fraction form
    1,248.22/1,721.78 = 799.94/x
  3. Step 3: Cross multiply
    1,248.22x = 1,721.78 × 799.94
  4. Step 4: Simplify right side
    1,248.22x = 1,377,321.69
  5. Step 5: Solve for x
    x = 1,377,321.69/1,248.22
  6. Step 6: Final answer
    x = 1,103.43

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.