Finding the Third Proportional to 670 and 1,330
Calculator
Solution
The third proportional to 670 and 1,330 is: 2,640.15
Step by Step Solution
- Step 1: Write the proportion equation
670 : 1,330 = 1,330 : x - Step 2: Convert to fraction form
670/1,330 = 1,330/x - Step 3: Cross multiply
670x = 1,330 × 1,330 - Step 4: Simplify right side
670x = 1,768,900 - Step 5: Solve for x
x = 1,768,900/670 - Step 6: Final answer
x = 2,640.15
Related Problems
Find third proportional to 335 and 665
Half scale
Find third proportional to 1,340 and 2,660
Double scale
Find third proportional to 672 and 1,334
Similar ratio
Find third proportional to 1,005 and 1,995
1.5x scale
Why These Related Problems?
These problems maintain the same ratio (1.99) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.