Finding the Third Proportional to 228.50 and 385
Calculator
Solution
The third proportional to 228.50 and 385 is: 648.69
Step by Step Solution
- Step 1: Write the proportion equation
228.50 : 385 = 385 : x - Step 2: Convert to fraction form
228.50/385 = 385/x - Step 3: Cross multiply
228.50x = 385 × 385 - Step 4: Simplify right side
228.50x = 148,225 - Step 5: Solve for x
x = 148,225/228.50 - Step 6: Final answer
x = 648.69
Related Problems
Find third proportional to 114.25 and 192.50
Half scale
Find third proportional to 457 and 770
Double scale
Find third proportional to 231 and 388
Similar ratio
Find third proportional to 342.75 and 577.50
1.5x scale
Why These Related Problems?
These problems maintain the same ratio (1.68) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.