Home / 2,578.40-3,867.48-1,191.27

Finding the Fourth Proportional to 2,578.40, 3,867.48 and 1,191.27

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Solution

The fourth proportional to 2,578.40, 3,867.48 and 1,191.27 is: 1,786.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,578.40 : 3,867.48 = 1,191.27 : x
  2. Step 2: Convert to fraction form
    2,578.40/3,867.48 = 1,191.27/x
  3. Step 3: Cross multiply
    2,578.40x = 3,867.48 × 1,191.27
  4. Step 4: Simplify right side
    2,578.40x = 4,607,212.90
  5. Step 5: Solve for x
    x = 4,607,212.90/2,578.40
  6. Step 6: Final answer
    x = 1,786.85

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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.