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Finding the Fourth Proportional to 2,132.70, 3,198.87 and 671.64

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Solution

The fourth proportional to 2,132.70, 3,198.87 and 671.64 is: 1,007.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,132.70 : 3,198.87 = 671.64 : x
  2. Step 2: Convert to fraction form
    2,132.70/3,198.87 = 671.64/x
  3. Step 3: Cross multiply
    2,132.70x = 3,198.87 × 671.64
  4. Step 4: Simplify right side
    2,132.70x = 2,148,489.05
  5. Step 5: Solve for x
    x = 2,148,489.05/2,132.70
  6. Step 6: Final answer
    x = 1,007.40

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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.