Finding the Third Proportional to 81 and 211
Calculator
Solution
The third proportional to 81 and 211 is: 549.64
Step by Step Solution
- Step 1: Write the proportion equation
81 : 211 = 211 : x - Step 2: Convert to fraction form
81/211 = 211/x - Step 3: Cross multiply
81x = 211 × 211 - Step 4: Simplify right side
81x = 44,521 - Step 5: Solve for x
x = 44,521/81 - Step 6: Final answer
x = 549.64
Related Problems
Find third proportional to 40.50 and 105.50
Half scale
Find third proportional to 162 and 422
Double scale
Find third proportional to 83 and 216
Similar ratio
Find third proportional to 121.50 and 316.50
1.5x scale
Why These Related Problems?
These problems maintain the same ratio (2.60) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.