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Finding the Fourth Proportional to 2,712.08, 4,068.17 and 863.22

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Solution

The fourth proportional to 2,712.08, 4,068.17 and 863.22 is: 1,294.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,712.08 : 4,068.17 = 863.22 : x
  2. Step 2: Convert to fraction form
    2,712.08/4,068.17 = 863.22/x
  3. Step 3: Cross multiply
    2,712.08x = 4,068.17 × 863.22
  4. Step 4: Simplify right side
    2,712.08x = 3,511,744.74
  5. Step 5: Solve for x
    x = 3,511,744.74/2,712.08
  6. Step 6: Final answer
    x = 1,294.85

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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.