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Finding the Fourth Proportional to 2,799.40, 3,863.12 and 1,620.44

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Solution

The fourth proportional to 2,799.40, 3,863.12 and 1,620.44 is: 2,236.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,799.40 : 3,863.12 = 1,620.44 : x
  2. Step 2: Convert to fraction form
    2,799.40/3,863.12 = 1,620.44/x
  3. Step 3: Cross multiply
    2,799.40x = 3,863.12 × 1,620.44
  4. Step 4: Simplify right side
    2,799.40x = 6,259,954.17
  5. Step 5: Solve for x
    x = 6,259,954.17/2,799.40
  6. Step 6: Final answer
    x = 2,236.18

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.