Home / 2,189.80-3,020.92-1,305.08

Finding the Fourth Proportional to 2,189.80, 3,020.92 and 1,305.08

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Solution

The fourth proportional to 2,189.80, 3,020.92 and 1,305.08 is: 1,800.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,189.80 : 3,020.92 = 1,305.08 : x
  2. Step 2: Convert to fraction form
    2,189.80/3,020.92 = 1,305.08/x
  3. Step 3: Cross multiply
    2,189.80x = 3,020.92 × 1,305.08
  4. Step 4: Simplify right side
    2,189.80x = 3,942,542.27
  5. Step 5: Solve for x
    x = 3,942,542.27/2,189.80
  6. Step 6: Final answer
    x = 1,800.41

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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.