Home / 2,189.09-3,020.47-1,305.19

Finding the Fourth Proportional to 2,189.09, 3,020.47 and 1,305.19

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Solution

The fourth proportional to 2,189.09, 3,020.47 and 1,305.19 is: 1,800.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,189.09 : 3,020.47 = 1,305.19 : x
  2. Step 2: Convert to fraction form
    2,189.09/3,020.47 = 1,305.19/x
  3. Step 3: Cross multiply
    2,189.09x = 3,020.47 × 1,305.19
  4. Step 4: Simplify right side
    2,189.09x = 3,942,287.24
  5. Step 5: Solve for x
    x = 3,942,287.24/2,189.09
  6. Step 6: Final answer
    x = 1,800.88

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Half scale
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Double scale
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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.