Home / 2,090.79-3,136.28-1,991.25

Finding the Fourth Proportional to 2,090.79, 3,136.28 and 1,991.25

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Solution

The fourth proportional to 2,090.79, 3,136.28 and 1,991.25 is: 2,986.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,090.79 : 3,136.28 = 1,991.25 : x
  2. Step 2: Convert to fraction form
    2,090.79/3,136.28 = 1,991.25/x
  3. Step 3: Cross multiply
    2,090.79x = 3,136.28 × 1,991.25
  4. Step 4: Simplify right side
    2,090.79x = 6,245,107.59
  5. Step 5: Solve for x
    x = 6,245,107.59/2,090.79
  6. Step 6: Final answer
    x = 2,986.96

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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.