Home / 2,189.94-3,022.14-1,305.78

Finding the Fourth Proportional to 2,189.94, 3,022.14 and 1,305.78

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Solution

The fourth proportional to 2,189.94, 3,022.14 and 1,305.78 is: 1,801.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,189.94 : 3,022.14 = 1,305.78 : x
  2. Step 2: Convert to fraction form
    2,189.94/3,022.14 = 1,305.78/x
  3. Step 3: Cross multiply
    2,189.94x = 3,022.14 × 1,305.78
  4. Step 4: Simplify right side
    2,189.94x = 3,946,249.97
  5. Step 5: Solve for x
    x = 3,946,249.97/2,189.94
  6. Step 6: Final answer
    x = 1,801.99

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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.