Home / 3,109.01-4,291.02-1,990.42

Finding the Fourth Proportional to 3,109.01, 4,291.02 and 1,990.42

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Solution

The fourth proportional to 3,109.01, 4,291.02 and 1,990.42 is: 2,747.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,109.01 : 4,291.02 = 1,990.42 : x
  2. Step 2: Convert to fraction form
    3,109.01/4,291.02 = 1,990.42/x
  3. Step 3: Cross multiply
    3,109.01x = 4,291.02 × 1,990.42
  4. Step 4: Simplify right side
    3,109.01x = 8,540,932.03
  5. Step 5: Solve for x
    x = 8,540,932.03/3,109.01
  6. Step 6: Final answer
    x = 2,747.15

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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.