Finding the Third Proportional to 257 and 336
Calculator
Solution
The third proportional to 257 and 336 is: 439.28
Step by Step Solution
- Step 1: Write the proportion equation
257 : 336 = 336 : x - Step 2: Convert to fraction form
257/336 = 336/x - Step 3: Cross multiply
257x = 336 × 336 - Step 4: Simplify right side
257x = 112,896 - Step 5: Solve for x
x = 112,896/257 - Step 6: Final answer
x = 439.28
Related Problems
Find third proportional to 128.50 and 168
Half scale
Find third proportional to 514 and 672
Double scale
Find third proportional to 259 and 339
Similar ratio
Find third proportional to 385.50 and 504
1.5x scale
Why These Related Problems?
These problems maintain the same ratio (1.31) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.