Home / 2,131.06-3,197.40-1,091.56

Finding the Fourth Proportional to 2,131.06, 3,197.40 and 1,091.56

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Solution

The fourth proportional to 2,131.06, 3,197.40 and 1,091.56 is: 1,637.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,131.06 : 3,197.40 = 1,091.56 : x
  2. Step 2: Convert to fraction form
    2,131.06/3,197.40 = 1,091.56/x
  3. Step 3: Cross multiply
    2,131.06x = 3,197.40 × 1,091.56
  4. Step 4: Simplify right side
    2,131.06x = 3,490,153.94
  5. Step 5: Solve for x
    x = 3,490,153.94/2,131.06
  6. Step 6: Final answer
    x = 1,637.75

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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.