Home / 2,189.91-3,021.70-1,305.39

Finding the Fourth Proportional to 2,189.91, 3,021.70 and 1,305.39

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Solution

The fourth proportional to 2,189.91, 3,021.70 and 1,305.39 is: 1,801.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,189.91 : 3,021.70 = 1,305.39 : x
  2. Step 2: Convert to fraction form
    2,189.91/3,021.70 = 1,305.39/x
  3. Step 3: Cross multiply
    2,189.91x = 3,021.70 × 1,305.39
  4. Step 4: Simplify right side
    2,189.91x = 3,944,496.96
  5. Step 5: Solve for x
    x = 3,944,496.96/2,189.91
  6. Step 6: Final answer
    x = 1,801.21

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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.