Home / 505.50-720.75

Finding the Third Proportional to 505.50 and 720.75

Calculator

Solution

The third proportional to 505.50 and 720.75 is: 1,027.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    505.50 : 720.75 = 720.75 : x
  2. Step 2: Convert to fraction form
    505.50/720.75 = 720.75/x
  3. Step 3: Cross multiply
    505.50x = 720.75 × 720.75
  4. Step 4: Simplify right side
    505.50x = 519,480.56
  5. Step 5: Solve for x
    x = 519,480.56/505.50
  6. Step 6: Final answer
    x = 1,027.66

Related Problems

Find third proportional to 252.75 and 360.38
Half scale
Find third proportional to 1,011 and 1,441.50
Double scale
Find third proportional to 508 and 724
Similar ratio
Find third proportional to 758.25 and 1,081.13
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.43) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.