Finding the Third Proportional to 111 and 217
Calculator
Solution
The third proportional to 111 and 217 is: 424.23
Step by Step Solution
- Step 1: Write the proportion equation
111 : 217 = 217 : x - Step 2: Convert to fraction form
111/217 = 217/x - Step 3: Cross multiply
111x = 217 × 217 - Step 4: Simplify right side
111x = 47,089 - Step 5: Solve for x
x = 47,089/111 - Step 6: Final answer
x = 424.23
Related Problems
Find third proportional to 55.50 and 108.50
Half scale
Find third proportional to 222 and 434
Double scale
Find third proportional to 113 and 221
Similar ratio
Find third proportional to 166.50 and 325.50
1.5x scale
Why These Related Problems?
These problems maintain the same ratio (1.95) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.