Finding the Third Proportional to 580 and 638
Calculator
Solution
The third proportional to 580 and 638 is: 701.80
Step by Step Solution
- Step 1: Write the proportion equation
580 : 638 = 638 : x - Step 2: Convert to fraction form
580/638 = 638/x - Step 3: Cross multiply
580x = 638 × 638 - Step 4: Simplify right side
580x = 407,044 - Step 5: Solve for x
x = 407,044/580 - Step 6: Final answer
x = 701.80
Related Problems
Find third proportional to 290 and 319
Half scale
Find third proportional to 1,160 and 1,276
Double scale
Find third proportional to 582 and 640
Similar ratio
Find third proportional to 870 and 957
1.5x scale
Why These Related Problems?
These problems maintain the same ratio (1.10) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.