Finding the Third Proportional to 311 and 503
Calculator
Solution
The third proportional to 311 and 503 is: 813.53
Step by Step Solution
- Step 1: Write the proportion equation
311 : 503 = 503 : x - Step 2: Convert to fraction form
311/503 = 503/x - Step 3: Cross multiply
311x = 503 × 503 - Step 4: Simplify right side
311x = 253,009 - Step 5: Solve for x
x = 253,009/311 - Step 6: Final answer
x = 813.53
Related Problems
Find third proportional to 155.50 and 251.50
Half scale
Find third proportional to 622 and 1,006
Double scale
Find third proportional to 313 and 506
Similar ratio
Find third proportional to 466.50 and 754.50
1.5x scale
Why These Related Problems?
These problems maintain the same ratio (1.62) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.