Home / 2,587.70-3,879.26-1,028.80

Finding the Fourth Proportional to 2,587.70, 3,879.26 and 1,028.80

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Solution

The fourth proportional to 2,587.70, 3,879.26 and 1,028.80 is: 1,542.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,587.70 : 3,879.26 = 1,028.80 : x
  2. Step 2: Convert to fraction form
    2,587.70/3,879.26 = 1,028.80/x
  3. Step 3: Cross multiply
    2,587.70x = 3,879.26 × 1,028.80
  4. Step 4: Simplify right side
    2,587.70x = 3,990,982.69
  5. Step 5: Solve for x
    x = 3,990,982.69/2,587.70
  6. Step 6: Final answer
    x = 1,542.29

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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.