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Finding the Fourth Proportional to 1,233.60, 1,702.53 and 791.61

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Solution

The fourth proportional to 1,233.60, 1,702.53 and 791.61 is: 1,092.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,233.60 : 1,702.53 = 791.61 : x
  2. Step 2: Convert to fraction form
    1,233.60/1,702.53 = 791.61/x
  3. Step 3: Cross multiply
    1,233.60x = 1,702.53 × 791.61
  4. Step 4: Simplify right side
    1,233.60x = 1,347,739.77
  5. Step 5: Solve for x
    x = 1,347,739.77/1,233.60
  6. Step 6: Final answer
    x = 1,092.53

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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.