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Finding the Fourth Proportional to 1,787.25, 2,679.75 and 863.04

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Solution

The fourth proportional to 1,787.25, 2,679.75 and 863.04 is: 1,294.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,787.25 : 2,679.75 = 863.04 : x
  2. Step 2: Convert to fraction form
    1,787.25/2,679.75 = 863.04/x
  3. Step 3: Cross multiply
    1,787.25x = 2,679.75 × 863.04
  4. Step 4: Simplify right side
    1,787.25x = 2,312,731.44
  5. Step 5: Solve for x
    x = 2,312,731.44/1,787.25
  6. Step 6: Final answer
    x = 1,294.02

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.