Home / 2,219.75-3,063.26-1,288.43

Finding the Fourth Proportional to 2,219.75, 3,063.26 and 1,288.43

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Solution

The fourth proportional to 2,219.75, 3,063.26 and 1,288.43 is: 1,778.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,219.75 : 3,063.26 = 1,288.43 : x
  2. Step 2: Convert to fraction form
    2,219.75/3,063.26 = 1,288.43/x
  3. Step 3: Cross multiply
    2,219.75x = 3,063.26 × 1,288.43
  4. Step 4: Simplify right side
    2,219.75x = 3,946,789.64
  5. Step 5: Solve for x
    x = 3,946,789.64/2,219.75
  6. Step 6: Final answer
    x = 1,778.03

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.