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Finding the Fourth Proportional to 2,688, 4,032.45 and 838.83

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Solution

The fourth proportional to 2,688, 4,032.45 and 838.83 is: 1,258.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,688 : 4,032.45 = 838.83 : x
  2. Step 2: Convert to fraction form
    2,688/4,032.45 = 838.83/x
  3. Step 3: Cross multiply
    2,688x = 4,032.45 × 838.83
  4. Step 4: Simplify right side
    2,688x = 3,382,540.03
  5. Step 5: Solve for x
    x = 3,382,540.03/2,688
  6. Step 6: Final answer
    x = 1,258.39

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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.