Home / 2,142.40-2,956.42-1,198.28

Finding the Fourth Proportional to 2,142.40, 2,956.42 and 1,198.28

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Solution

The fourth proportional to 2,142.40, 2,956.42 and 1,198.28 is: 1,653.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,142.40 : 2,956.42 = 1,198.28 : x
  2. Step 2: Convert to fraction form
    2,142.40/2,956.42 = 1,198.28/x
  3. Step 3: Cross multiply
    2,142.40x = 2,956.42 × 1,198.28
  4. Step 4: Simplify right side
    2,142.40x = 3,542,618.96
  5. Step 5: Solve for x
    x = 3,542,618.96/2,142.40
  6. Step 6: Final answer
    x = 1,653.57

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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.