Finding the Third Proportional to 380 and 411.50
Calculator
Solution
The third proportional to 380 and 411.50 is: 445.61
Step by Step Solution
- Step 1: Write the proportion equation
380 : 411.50 = 411.50 : x - Step 2: Convert to fraction form
380/411.50 = 411.50/x - Step 3: Cross multiply
380x = 411.50 × 411.50 - Step 4: Simplify right side
380x = 169,332.25 - Step 5: Solve for x
x = 169,332.25/380 - Step 6: Final answer
x = 445.61
Related Problems
Find third proportional to 190 and 205.75
Half scale
Find third proportional to 760 and 823
Double scale
Find third proportional to 382 and 414
Similar ratio
Find third proportional to 570 and 617.25
1.5x scale
Why These Related Problems?
These problems maintain the same ratio (1.08) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.