Finding the Third Proportional to 385 and 648
Calculator
Solution
The third proportional to 385 and 648 is: 1,090.66
Step by Step Solution
- Step 1: Write the proportion equation
385 : 648 = 648 : x - Step 2: Convert to fraction form
385/648 = 648/x - Step 3: Cross multiply
385x = 648 × 648 - Step 4: Simplify right side
385x = 419,904 - Step 5: Solve for x
x = 419,904/385 - Step 6: Final answer
x = 1,090.66
Related Problems
Find third proportional to 192.50 and 324
Half scale
Find third proportional to 770 and 1,296
Double scale
Find third proportional to 387 and 651
Similar ratio
Find third proportional to 577.50 and 972
1.5x scale
Why These Related Problems?
These problems maintain the same ratio (1.68) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.