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Finding the Fourth Proportional to 2,132.93, 3,198.38 and 671.28

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Solution

The fourth proportional to 2,132.93, 3,198.38 and 671.28 is: 1,006.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,132.93 : 3,198.38 = 671.28 : x
  2. Step 2: Convert to fraction form
    2,132.93/3,198.38 = 671.28/x
  3. Step 3: Cross multiply
    2,132.93x = 3,198.38 × 671.28
  4. Step 4: Simplify right side
    2,132.93x = 2,147,005.17
  5. Step 5: Solve for x
    x = 2,147,005.17/2,132.93
  6. Step 6: Final answer
    x = 1,006.60

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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.