Home / 3,680.87-5,078.30-2,087.28

Finding the Fourth Proportional to 3,680.87, 5,078.30 and 2,087.28

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Solution

The fourth proportional to 3,680.87, 5,078.30 and 2,087.28 is: 2,879.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,680.87 : 5,078.30 = 2,087.28 : x
  2. Step 2: Convert to fraction form
    3,680.87/5,078.30 = 2,087.28/x
  3. Step 3: Cross multiply
    3,680.87x = 5,078.30 × 2,087.28
  4. Step 4: Simplify right side
    3,680.87x = 10,599,823.59
  5. Step 5: Solve for x
    x = 10,599,823.59/3,680.87
  6. Step 6: Final answer
    x = 2,879.71

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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.