Home / 1,982.20-2,974.38-1,252.12

Finding the Fourth Proportional to 1,982.20, 2,974.38 and 1,252.12

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Solution

The fourth proportional to 1,982.20, 2,974.38 and 1,252.12 is: 1,878.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,982.20 : 2,974.38 = 1,252.12 : x
  2. Step 2: Convert to fraction form
    1,982.20/2,974.38 = 1,252.12/x
  3. Step 3: Cross multiply
    1,982.20x = 2,974.38 × 1,252.12
  4. Step 4: Simplify right side
    1,982.20x = 3,724,280.69
  5. Step 5: Solve for x
    x = 3,724,280.69/1,982.20
  6. Step 6: Final answer
    x = 1,878.86

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1.5x scale

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.