Finding the Third Proportional to 406 and 628
Calculator
Solution
The third proportional to 406 and 628 is: 971.39
Step by Step Solution
- Step 1: Write the proportion equation
406 : 628 = 628 : x - Step 2: Convert to fraction form
406/628 = 628/x - Step 3: Cross multiply
406x = 628 × 628 - Step 4: Simplify right side
406x = 394,384 - Step 5: Solve for x
x = 394,384/406 - Step 6: Final answer
x = 971.39
Related Problems
Find third proportional to 203 and 314
Half scale
Find third proportional to 812 and 1,256
Double scale
Find third proportional to 408 and 631
Similar ratio
Find third proportional to 609 and 942
1.5x scale
Why These Related Problems?
These problems maintain the same ratio (1.55) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.