Finding the Third Proportional to 316 and 440
Calculator
Solution
The third proportional to 316 and 440 is: 612.66
Step by Step Solution
- Step 1: Write the proportion equation
316 : 440 = 440 : x - Step 2: Convert to fraction form
316/440 = 440/x - Step 3: Cross multiply
316x = 440 × 440 - Step 4: Simplify right side
316x = 193,600 - Step 5: Solve for x
x = 193,600/316 - Step 6: Final answer
x = 612.66
Related Problems
Find third proportional to 158 and 220
Half scale
Find third proportional to 632 and 880
Double scale
Find third proportional to 318 and 443
Similar ratio
Find third proportional to 474 and 660
1.5x scale
Why These Related Problems?
These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.