Finding the Third Proportional to 396 and 618
Calculator
Solution
The third proportional to 396 and 618 is: 964.45
Step by Step Solution
- Step 1: Write the proportion equation
396 : 618 = 618 : x - Step 2: Convert to fraction form
396/618 = 618/x - Step 3: Cross multiply
396x = 618 × 618 - Step 4: Simplify right side
396x = 381,924 - Step 5: Solve for x
x = 381,924/396 - Step 6: Final answer
x = 964.45
Related Problems
Find third proportional to 198 and 309
Half scale
Find third proportional to 792 and 1,236
Double scale
Find third proportional to 398 and 621
Similar ratio
Find third proportional to 594 and 927
1.5x scale
Why These Related Problems?
These problems maintain the same ratio (1.56) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.