Home / 2,171.15-3,250.03-1,388.55

Finding the Fourth Proportional to 2,171.15, 3,250.03 and 1,388.55

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Solution

The fourth proportional to 2,171.15, 3,250.03 and 1,388.55 is: 2,078.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,171.15 : 3,250.03 = 1,388.55 : x
  2. Step 2: Convert to fraction form
    2,171.15/3,250.03 = 1,388.55/x
  3. Step 3: Cross multiply
    2,171.15x = 3,250.03 × 1,388.55
  4. Step 4: Simplify right side
    2,171.15x = 4,512,829.16
  5. Step 5: Solve for x
    x = 4,512,829.16/2,171.15
  6. Step 6: Final answer
    x = 2,078.54

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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.