Home / 2,718.78-4,078.80-1,257.60

Finding the Fourth Proportional to 2,718.78, 4,078.80 and 1,257.60

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Solution

The fourth proportional to 2,718.78, 4,078.80 and 1,257.60 is: 1,886.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,718.78 : 4,078.80 = 1,257.60 : x
  2. Step 2: Convert to fraction form
    2,718.78/4,078.80 = 1,257.60/x
  3. Step 3: Cross multiply
    2,718.78x = 4,078.80 × 1,257.60
  4. Step 4: Simplify right side
    2,718.78x = 5,129,498.88
  5. Step 5: Solve for x
    x = 5,129,498.88/2,718.78
  6. Step 6: Final answer
    x = 1,886.69

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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.