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Finding the Fourth Proportional to 843.94, 1,272.82 and 834.74

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Solution

The fourth proportional to 843.94, 1,272.82 and 834.74 is: 1,258.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    843.94 : 1,272.82 = 834.74 : x
  2. Step 2: Convert to fraction form
    843.94/1,272.82 = 834.74/x
  3. Step 3: Cross multiply
    843.94x = 1,272.82 × 834.74
  4. Step 4: Simplify right side
    843.94x = 1,062,463.23
  5. Step 5: Solve for x
    x = 1,062,463.23/843.94
  6. Step 6: Final answer
    x = 1,258.94

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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.