Home / 1,391.39-2,087.53-1,198.20

Finding the Fourth Proportional to 1,391.39, 2,087.53 and 1,198.20

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Solution

The fourth proportional to 1,391.39, 2,087.53 and 1,198.20 is: 1,797.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,391.39 : 2,087.53 = 1,198.20 : x
  2. Step 2: Convert to fraction form
    1,391.39/2,087.53 = 1,198.20/x
  3. Step 3: Cross multiply
    1,391.39x = 2,087.53 × 1,198.20
  4. Step 4: Simplify right side
    1,391.39x = 2,501,275.45
  5. Step 5: Solve for x
    x = 2,501,275.45/1,391.39
  6. Step 6: Final answer
    x = 1,797.69

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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.