Home / 2,189.40-3,021.13-1,305.03

Finding the Fourth Proportional to 2,189.40, 3,021.13 and 1,305.03

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Solution

The fourth proportional to 2,189.40, 3,021.13 and 1,305.03 is: 1,800.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,189.40 : 3,021.13 = 1,305.03 : x
  2. Step 2: Convert to fraction form
    2,189.40/3,021.13 = 1,305.03/x
  3. Step 3: Cross multiply
    2,189.40x = 3,021.13 × 1,305.03
  4. Step 4: Simplify right side
    2,189.40x = 3,942,665.28
  5. Step 5: Solve for x
    x = 3,942,665.28/2,189.40
  6. Step 6: Final answer
    x = 1,800.80

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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.