Home / 2,005-3,115

Finding the Third Proportional to 2,005 and 3,115

Calculator

Solution

The third proportional to 2,005 and 3,115 is: 4,839.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,005 : 3,115 = 3,115 : x
  2. Step 2: Convert to fraction form
    2,005/3,115 = 3,115/x
  3. Step 3: Cross multiply
    2,005x = 3,115 × 3,115
  4. Step 4: Simplify right side
    2,005x = 9,703,225
  5. Step 5: Solve for x
    x = 9,703,225/2,005
  6. Step 6: Final answer
    x = 4,839.51

Related Problems

Find third proportional to 1,002.50 and 1,557.50
Half scale
Find third proportional to 4,010 and 6,230
Double scale
Find third proportional to 2,007 and 3,118
Similar ratio
Find third proportional to 3,007.50 and 4,672.50
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.55) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.