Finding the Third Proportional to 386 and 418
Calculator
Solution
The third proportional to 386 and 418 is: 452.65
Step by Step Solution
- Step 1: Write the proportion equation
386 : 418 = 418 : x - Step 2: Convert to fraction form
386/418 = 418/x - Step 3: Cross multiply
386x = 418 × 418 - Step 4: Simplify right side
386x = 174,724 - Step 5: Solve for x
x = 174,724/386 - Step 6: Final answer
x = 452.65
Related Problems
Find third proportional to 193 and 209
Half scale
Find third proportional to 772 and 836
Double scale
Find third proportional to 388 and 420
Similar ratio
Find third proportional to 579 and 627
1.5x scale
Why These Related Problems?
These problems maintain the same ratio (1.08) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.