Home / 1,974.12-2,724.21-1,228.20

Finding the Fourth Proportional to 1,974.12, 2,724.21 and 1,228.20

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Solution

The fourth proportional to 1,974.12, 2,724.21 and 1,228.20 is: 1,694.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,974.12 : 2,724.21 = 1,228.20 : x
  2. Step 2: Convert to fraction form
    1,974.12/2,724.21 = 1,228.20/x
  3. Step 3: Cross multiply
    1,974.12x = 2,724.21 × 1,228.20
  4. Step 4: Simplify right side
    1,974.12x = 3,345,874.72
  5. Step 5: Solve for x
    x = 3,345,874.72/1,974.12
  6. Step 6: Final answer
    x = 1,694.87

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1.5x scale

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.