Home / 636.38-1,380.75

Finding the Third Proportional to 636.38 and 1,380.75

Calculator

Solution

The third proportional to 636.38 and 1,380.75 is: 2,995.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    636.38 : 1,380.75 = 1,380.75 : x
  2. Step 2: Convert to fraction form
    636.38/1,380.75 = 1,380.75/x
  3. Step 3: Cross multiply
    636.38x = 1,380.75 × 1,380.75
  4. Step 4: Simplify right side
    636.38x = 1,906,470.56
  5. Step 5: Solve for x
    x = 1,906,470.56/636.38
  6. Step 6: Final answer
    x = 2,995.83

Related Problems

Find third proportional to 318.19 and 690.38
Half scale
Find third proportional to 1,272.75 and 2,761.50
Double scale
Find third proportional to 638 and 1,385
Similar ratio
Find third proportional to 954.56 and 2,071.13
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (2.17) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.