Finding the Third Proportional to 216 and 220
Calculator
Solution
The third proportional to 216 and 220 is: 224.07
Step by Step Solution
- Step 1: Write the proportion equation
216 : 220 = 220 : x - Step 2: Convert to fraction form
216/220 = 220/x - Step 3: Cross multiply
216x = 220 × 220 - Step 4: Simplify right side
216x = 48,400 - Step 5: Solve for x
x = 48,400/216 - Step 6: Final answer
x = 224.07
Related Problems
Find third proportional to 108 and 110
Half scale
Find third proportional to 432 and 440
Double scale
Find third proportional to 218 and 222
Similar ratio
Find third proportional to 324 and 330
1.5x scale
Why These Related Problems?
These problems maintain the same ratio (1.02) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.