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Finding the Fourth Proportional to 2,688, 4,023.68 and 1,863.68

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Solution

The fourth proportional to 2,688, 4,023.68 and 1,863.68 is: 2,789.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,688 : 4,023.68 = 1,863.68 : x
  2. Step 2: Convert to fraction form
    2,688/4,023.68 = 1,863.68/x
  3. Step 3: Cross multiply
    2,688x = 4,023.68 × 1,863.68
  4. Step 4: Simplify right side
    2,688x = 7,498,851.94
  5. Step 5: Solve for x
    x = 7,498,851.94/2,688
  6. Step 6: Final answer
    x = 2,789.75

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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.