Home / 3,761.28-5,190.54-2,189.40

Finding the Fourth Proportional to 3,761.28, 5,190.54 and 2,189.40

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Solution

The fourth proportional to 3,761.28, 5,190.54 and 2,189.40 is: 3,021.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,761.28 : 5,190.54 = 2,189.40 : x
  2. Step 2: Convert to fraction form
    3,761.28/5,190.54 = 2,189.40/x
  3. Step 3: Cross multiply
    3,761.28x = 5,190.54 × 2,189.40
  4. Step 4: Simplify right side
    3,761.28x = 11,364,168.28
  5. Step 5: Solve for x
    x = 11,364,168.28/3,761.28
  6. Step 6: Final answer
    x = 3,021.36

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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.