Finding the Third Proportional to 342 and 388
Calculator
Solution
The third proportional to 342 and 388 is: 440.19
Step by Step Solution
- Step 1: Write the proportion equation
342 : 388 = 388 : x - Step 2: Convert to fraction form
342/388 = 388/x - Step 3: Cross multiply
342x = 388 × 388 - Step 4: Simplify right side
342x = 150,544 - Step 5: Solve for x
x = 150,544/342 - Step 6: Final answer
x = 440.19
Related Problems
Find third proportional to 171 and 194
Half scale
Find third proportional to 684 and 776
Double scale
Find third proportional to 344 and 390
Similar ratio
Find third proportional to 513 and 582
1.5x scale
Why These Related Problems?
These problems maintain the same ratio (1.13) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.