Home / 1,974.21-2,724.30-1,228.15

Finding the Fourth Proportional to 1,974.21, 2,724.30 and 1,228.15

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Solution

The fourth proportional to 1,974.21, 2,724.30 and 1,228.15 is: 1,694.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,974.21 : 2,724.30 = 1,228.15 : x
  2. Step 2: Convert to fraction form
    1,974.21/2,724.30 = 1,228.15/x
  3. Step 3: Cross multiply
    1,974.21x = 2,724.30 × 1,228.15
  4. Step 4: Simplify right side
    1,974.21x = 3,345,849.05
  5. Step 5: Solve for x
    x = 3,345,849.05/1,974.21
  6. Step 6: Final answer
    x = 1,694.78

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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.