Home / 2,132.38-3,198.30-1,309.20

Finding the Fourth Proportional to 2,132.38, 3,198.30 and 1,309.20

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Solution

The fourth proportional to 2,132.38, 3,198.30 and 1,309.20 is: 1,963.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,132.38 : 3,198.30 = 1,309.20 : x
  2. Step 2: Convert to fraction form
    2,132.38/3,198.30 = 1,309.20/x
  3. Step 3: Cross multiply
    2,132.38x = 3,198.30 × 1,309.20
  4. Step 4: Simplify right side
    2,132.38x = 4,187,214.36
  5. Step 5: Solve for x
    x = 4,187,214.36/2,132.38
  6. Step 6: Final answer
    x = 1,963.63

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1.5x scale

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.