Home / 1,974.28-2,724.39-1,228.21

Finding the Fourth Proportional to 1,974.28, 2,724.39 and 1,228.21

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Solution

The fourth proportional to 1,974.28, 2,724.39 and 1,228.21 is: 1,694.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,974.28 : 2,724.39 = 1,228.21 : x
  2. Step 2: Convert to fraction form
    1,974.28/2,724.39 = 1,228.21/x
  3. Step 3: Cross multiply
    1,974.28x = 2,724.39 × 1,228.21
  4. Step 4: Simplify right side
    1,974.28x = 3,346,123.04
  5. Step 5: Solve for x
    x = 3,346,123.04/1,974.28
  6. Step 6: Final answer
    x = 1,694.86

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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.