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Finding the Fourth Proportional to 1,233.75, 1,703.49 and 791.90

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Solution

The fourth proportional to 1,233.75, 1,703.49 and 791.90 is: 1,093.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,233.75 : 1,703.49 = 791.90 : x
  2. Step 2: Convert to fraction form
    1,233.75/1,703.49 = 791.90/x
  3. Step 3: Cross multiply
    1,233.75x = 1,703.49 × 791.90
  4. Step 4: Simplify right side
    1,233.75x = 1,348,993.73
  5. Step 5: Solve for x
    x = 1,348,993.73/1,233.75
  6. Step 6: Final answer
    x = 1,093.41

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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.