Home / 2,578.16-3,867.60-1,279.68

Finding the Fourth Proportional to 2,578.16, 3,867.60 and 1,279.68

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Solution

The fourth proportional to 2,578.16, 3,867.60 and 1,279.68 is: 1,919.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,578.16 : 3,867.60 = 1,279.68 : x
  2. Step 2: Convert to fraction form
    2,578.16/3,867.60 = 1,279.68/x
  3. Step 3: Cross multiply
    2,578.16x = 3,867.60 × 1,279.68
  4. Step 4: Simplify right side
    2,578.16x = 4,949,290.37
  5. Step 5: Solve for x
    x = 4,949,290.37/2,578.16
  6. Step 6: Final answer
    x = 1,919.70

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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.