Finding the Third Proportional to 115 and 213.50
Calculator
Solution
The third proportional to 115 and 213.50 is: 396.37
Step by Step Solution
- Step 1: Write the proportion equation
115 : 213.50 = 213.50 : x - Step 2: Convert to fraction form
115/213.50 = 213.50/x - Step 3: Cross multiply
115x = 213.50 × 213.50 - Step 4: Simplify right side
115x = 45,582.25 - Step 5: Solve for x
x = 45,582.25/115 - Step 6: Final answer
x = 396.37
Related Problems
Find third proportional to 57.50 and 106.75
Half scale
Find third proportional to 230 and 427
Double scale
Find third proportional to 117 and 217
Similar ratio
Find third proportional to 172.50 and 320.25
1.5x scale
Why These Related Problems?
These problems maintain the same ratio (1.86) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.