Finding the Third Proportional to 319 and 630
Calculator
Solution
The third proportional to 319 and 630 is: 1,244.20
Step by Step Solution
- Step 1: Write the proportion equation
319 : 630 = 630 : x - Step 2: Convert to fraction form
319/630 = 630/x - Step 3: Cross multiply
319x = 630 × 630 - Step 4: Simplify right side
319x = 396,900 - Step 5: Solve for x
x = 396,900/319 - Step 6: Final answer
x = 1,244.20
Related Problems
Find third proportional to 159.50 and 315
Half scale
Find third proportional to 638 and 1,260
Double scale
Find third proportional to 321 and 634
Similar ratio
Find third proportional to 478.50 and 945
1.5x scale
Why These Related Problems?
These problems maintain the same ratio (1.97) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.