Home / 2,132.43-3,198.40-670.78

Finding the Fourth Proportional to 2,132.43, 3,198.40 and 670.78

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Solution

The fourth proportional to 2,132.43, 3,198.40 and 670.78 is: 1,006.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,132.43 : 3,198.40 = 670.78 : x
  2. Step 2: Convert to fraction form
    2,132.43/3,198.40 = 670.78/x
  3. Step 3: Cross multiply
    2,132.43x = 3,198.40 × 670.78
  4. Step 4: Simplify right side
    2,132.43x = 2,145,422.75
  5. Step 5: Solve for x
    x = 2,145,422.75/2,132.43
  6. Step 6: Final answer
    x = 1,006.09

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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.