Home / 2,130.94-3,198.31-1,091.65

Finding the Fourth Proportional to 2,130.94, 3,198.31 and 1,091.65

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Solution

The fourth proportional to 2,130.94, 3,198.31 and 1,091.65 is: 1,638.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,130.94 : 3,198.31 = 1,091.65 : x
  2. Step 2: Convert to fraction form
    2,130.94/3,198.31 = 1,091.65/x
  3. Step 3: Cross multiply
    2,130.94x = 3,198.31 × 1,091.65
  4. Step 4: Simplify right side
    2,130.94x = 3,491,435.11
  5. Step 5: Solve for x
    x = 3,491,435.11/2,130.94
  6. Step 6: Final answer
    x = 1,638.45

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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.