Finding the Third Proportional to 339 and 558
Calculator
Solution
The third proportional to 339 and 558 is: 918.48
Step by Step Solution
- Step 1: Write the proportion equation
339 : 558 = 558 : x - Step 2: Convert to fraction form
339/558 = 558/x - Step 3: Cross multiply
339x = 558 × 558 - Step 4: Simplify right side
339x = 311,364 - Step 5: Solve for x
x = 311,364/339 - Step 6: Final answer
x = 918.48
Related Problems
Find third proportional to 169.50 and 279
Half scale
Find third proportional to 678 and 1,116
Double scale
Find third proportional to 341 and 561
Similar ratio
Find third proportional to 508.50 and 837
1.5x scale
Why These Related Problems?
These problems maintain the same ratio (1.65) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.