Home / 2,231.03-3,078.50-1,286.75

Finding the Fourth Proportional to 2,231.03, 3,078.50 and 1,286.75

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Solution

The fourth proportional to 2,231.03, 3,078.50 and 1,286.75 is: 1,775.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,231.03 : 3,078.50 = 1,286.75 : x
  2. Step 2: Convert to fraction form
    2,231.03/3,078.50 = 1,286.75/x
  3. Step 3: Cross multiply
    2,231.03x = 3,078.50 × 1,286.75
  4. Step 4: Simplify right side
    2,231.03x = 3,961,259.88
  5. Step 5: Solve for x
    x = 3,961,259.88/2,231.03
  6. Step 6: Final answer
    x = 1,775.53

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Double scale
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1.5x scale

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.