Finding the Third Proportional to 402 and 480
Calculator
Solution
The third proportional to 402 and 480 is: 573.13
Step by Step Solution
- Step 1: Write the proportion equation
402 : 480 = 480 : x - Step 2: Convert to fraction form
402/480 = 480/x - Step 3: Cross multiply
402x = 480 × 480 - Step 4: Simplify right side
402x = 230,400 - Step 5: Solve for x
x = 230,400/402 - Step 6: Final answer
x = 573.13
Related Problems
Find third proportional to 201 and 240
Half scale
Find third proportional to 804 and 960
Double scale
Find third proportional to 404 and 482
Similar ratio
Find third proportional to 603 and 720
1.5x scale
Why These Related Problems?
These problems maintain the same ratio (1.19) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.