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Finding the Fourth Proportional to 843.92, 1,270.43 and 759.15

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Solution

The fourth proportional to 843.92, 1,270.43 and 759.15 is: 1,142.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    843.92 : 1,270.43 = 759.15 : x
  2. Step 2: Convert to fraction form
    843.92/1,270.43 = 759.15/x
  3. Step 3: Cross multiply
    843.92x = 1,270.43 × 759.15
  4. Step 4: Simplify right side
    843.92x = 964,446.93
  5. Step 5: Solve for x
    x = 964,446.93/843.92
  6. Step 6: Final answer
    x = 1,142.82

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.