Home / 329.97-720.81

Finding the Third Proportional to 329.97 and 720.81

Calculator

Solution

The third proportional to 329.97 and 720.81 is: 1,574.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    329.97 : 720.81 = 720.81 : x
  2. Step 2: Convert to fraction form
    329.97/720.81 = 720.81/x
  3. Step 3: Cross multiply
    329.97x = 720.81 × 720.81
  4. Step 4: Simplify right side
    329.97x = 519,571.36
  5. Step 5: Solve for x
    x = 519,571.36/329.97
  6. Step 6: Final answer
    x = 1,574.59

Related Problems

Find third proportional to 164.99 and 360.41
Half scale
Find third proportional to 659.94 and 1,441.63
Double scale
Find third proportional to 332 and 725
Similar ratio
Find third proportional to 494.96 and 1,081.22
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (2.18) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.