Home / 308.25-480.75

Finding the Third Proportional to 308.25 and 480.75

Calculator

Solution

The third proportional to 308.25 and 480.75 is: 749.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    308.25 : 480.75 = 480.75 : x
  2. Step 2: Convert to fraction form
    308.25/480.75 = 480.75/x
  3. Step 3: Cross multiply
    308.25x = 480.75 × 480.75
  4. Step 4: Simplify right side
    308.25x = 231,120.56
  5. Step 5: Solve for x
    x = 231,120.56/308.25
  6. Step 6: Final answer
    x = 749.78

Related Problems

Find third proportional to 154.13 and 240.38
Half scale
Find third proportional to 616.50 and 961.50
Double scale
Find third proportional to 310 and 484
Similar ratio
Find third proportional to 462.38 and 721.13
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.56) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.