Finding the Third Proportional to 351 and 421.50
Calculator
Solution
The third proportional to 351 and 421.50 is: 506.16
Step by Step Solution
- Step 1: Write the proportion equation
351 : 421.50 = 421.50 : x - Step 2: Convert to fraction form
351/421.50 = 421.50/x - Step 3: Cross multiply
351x = 421.50 × 421.50 - Step 4: Simplify right side
351x = 177,662.25 - Step 5: Solve for x
x = 177,662.25/351 - Step 6: Final answer
x = 506.16
Related Problems
Find third proportional to 175.50 and 210.75
Half scale
Find third proportional to 702 and 843
Double scale
Find third proportional to 353 and 424
Similar ratio
Find third proportional to 526.50 and 632.25
1.5x scale
Why These Related Problems?
These problems maintain the same ratio (1.20) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.