Home / 2,788.80-4,185.60-1,231.20

Finding the Fourth Proportional to 2,788.80, 4,185.60 and 1,231.20

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Solution

The fourth proportional to 2,788.80, 4,185.60 and 1,231.20 is: 1,847.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,788.80 : 4,185.60 = 1,231.20 : x
  2. Step 2: Convert to fraction form
    2,788.80/4,185.60 = 1,231.20/x
  3. Step 3: Cross multiply
    2,788.80x = 4,185.60 × 1,231.20
  4. Step 4: Simplify right side
    2,788.80x = 5,153,310.72
  5. Step 5: Solve for x
    x = 5,153,310.72/2,788.80
  6. Step 6: Final answer
    x = 1,847.86

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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.