Home / 3,419.19-5,128.78-2,640.33

Finding the Fourth Proportional to 3,419.19, 5,128.78 and 2,640.33

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Solution

The fourth proportional to 3,419.19, 5,128.78 and 2,640.33 is: 3,960.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,419.19 : 5,128.78 = 2,640.33 : x
  2. Step 2: Convert to fraction form
    3,419.19/5,128.78 = 2,640.33/x
  3. Step 3: Cross multiply
    3,419.19x = 5,128.78 × 2,640.33
  4. Step 4: Simplify right side
    3,419.19x = 13,541,632.85
  5. Step 5: Solve for x
    x = 13,541,632.85/3,419.19
  6. Step 6: Final answer
    x = 3,960.49

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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.