Finding the Third Proportional to 156 and 324
Calculator
Solution
The third proportional to 156 and 324 is: 672.92
Step by Step Solution
- Step 1: Write the proportion equation
156 : 324 = 324 : x - Step 2: Convert to fraction form
156/324 = 324/x - Step 3: Cross multiply
156x = 324 × 324 - Step 4: Simplify right side
156x = 104,976 - Step 5: Solve for x
x = 104,976/156 - Step 6: Final answer
x = 672.92
Related Problems
Find third proportional to 78 and 162
Half scale
Find third proportional to 312 and 648
Double scale
Find third proportional to 158 and 328
Similar ratio
Find third proportional to 234 and 486
1.5x scale
Why These Related Problems?
These problems maintain the same ratio (2.08) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.