Home / 648.75-720.75

Finding the Third Proportional to 648.75 and 720.75

Calculator

Solution

The third proportional to 648.75 and 720.75 is: 800.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    648.75 : 720.75 = 720.75 : x
  2. Step 2: Convert to fraction form
    648.75/720.75 = 720.75/x
  3. Step 3: Cross multiply
    648.75x = 720.75 × 720.75
  4. Step 4: Simplify right side
    648.75x = 519,480.56
  5. Step 5: Solve for x
    x = 519,480.56/648.75
  6. Step 6: Final answer
    x = 800.74

Related Problems

Find third proportional to 324.38 and 360.38
Half scale
Find third proportional to 1,297.50 and 1,441.50
Double scale
Find third proportional to 651 and 723
Similar ratio
Find third proportional to 973.13 and 1,081.13
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.11) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.