Finding the Third Proportional to 221 and 379
Calculator
Solution
The third proportional to 221 and 379 is: 649.96
Step by Step Solution
- Step 1: Write the proportion equation
221 : 379 = 379 : x - Step 2: Convert to fraction form
221/379 = 379/x - Step 3: Cross multiply
221x = 379 × 379 - Step 4: Simplify right side
221x = 143,641 - Step 5: Solve for x
x = 143,641/221 - Step 6: Final answer
x = 649.96
Related Problems
Find third proportional to 110.50 and 189.50
Half scale
Find third proportional to 442 and 758
Double scale
Find third proportional to 223 and 382
Similar ratio
Find third proportional to 331.50 and 568.50
1.5x scale
Why These Related Problems?
These problems maintain the same ratio (1.71) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.