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Finding the Fourth Proportional to 2,720.92, 4,078.44 and 1,949.08

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Solution

The fourth proportional to 2,720.92, 4,078.44 and 1,949.08 is: 2,921.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,720.92 : 4,078.44 = 1,949.08 : x
  2. Step 2: Convert to fraction form
    2,720.92/4,078.44 = 1,949.08/x
  3. Step 3: Cross multiply
    2,720.92x = 4,078.44 × 1,949.08
  4. Step 4: Simplify right side
    2,720.92x = 7,949,205.84
  5. Step 5: Solve for x
    x = 7,949,205.84/2,720.92
  6. Step 6: Final answer
    x = 2,921.51

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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.