Finding the Third Proportional to 646 and 1,218
Calculator
Solution
The third proportional to 646 and 1,218 is: 2,296.48
Step by Step Solution
- Step 1: Write the proportion equation
646 : 1,218 = 1,218 : x - Step 2: Convert to fraction form
646/1,218 = 1,218/x - Step 3: Cross multiply
646x = 1,218 × 1,218 - Step 4: Simplify right side
646x = 1,483,524 - Step 5: Solve for x
x = 1,483,524/646 - Step 6: Final answer
x = 2,296.48
Related Problems
Find third proportional to 323 and 609
Half scale
Find third proportional to 1,292 and 2,436
Double scale
Find third proportional to 648 and 1,222
Similar ratio
Find third proportional to 969 and 1,827
1.5x scale
Why These Related Problems?
These problems maintain the same ratio (1.89) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.