Home / 2,132.60-3,198.90-1,331.40

Finding the Fourth Proportional to 2,132.60, 3,198.90 and 1,331.40

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Solution

The fourth proportional to 2,132.60, 3,198.90 and 1,331.40 is: 1,997.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,132.60 : 3,198.90 = 1,331.40 : x
  2. Step 2: Convert to fraction form
    2,132.60/3,198.90 = 1,331.40/x
  3. Step 3: Cross multiply
    2,132.60x = 3,198.90 × 1,331.40
  4. Step 4: Simplify right side
    2,132.60x = 4,259,032.45
  5. Step 5: Solve for x
    x = 4,259,032.45/2,132.60
  6. Step 6: Final answer
    x = 1,997.11

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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.