Finding the Third Proportional to 389 and 506
Calculator
Solution
The third proportional to 389 and 506 is: 658.19
Step by Step Solution
- Step 1: Write the proportion equation
389 : 506 = 506 : x - Step 2: Convert to fraction form
389/506 = 506/x - Step 3: Cross multiply
389x = 506 × 506 - Step 4: Simplify right side
389x = 256,036 - Step 5: Solve for x
x = 256,036/389 - Step 6: Final answer
x = 658.19
Related Problems
Find third proportional to 194.50 and 253
Half scale
Find third proportional to 778 and 1,012
Double scale
Find third proportional to 391 and 509
Similar ratio
Find third proportional to 583.50 and 759
1.5x scale
Why These Related Problems?
These problems maintain the same ratio (1.30) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.