Home / 2,142.30-2,956.44-1,198.20

Finding the Fourth Proportional to 2,142.30, 2,956.44 and 1,198.20

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Solution

The fourth proportional to 2,142.30, 2,956.44 and 1,198.20 is: 1,653.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,142.30 : 2,956.44 = 1,198.20 : x
  2. Step 2: Convert to fraction form
    2,142.30/2,956.44 = 1,198.20/x
  3. Step 3: Cross multiply
    2,142.30x = 2,956.44 × 1,198.20
  4. Step 4: Simplify right side
    2,142.30x = 3,542,406.41
  5. Step 5: Solve for x
    x = 3,542,406.41/2,142.30
  6. Step 6: Final answer
    x = 1,653.55

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.