Finding the Third Proportional to 878 and 980
Calculator
Solution
The third proportional to 878 and 980 is: 1,093.85
Step by Step Solution
- Step 1: Write the proportion equation
878 : 980 = 980 : x - Step 2: Convert to fraction form
878/980 = 980/x - Step 3: Cross multiply
878x = 980 × 980 - Step 4: Simplify right side
878x = 960,400 - Step 5: Solve for x
x = 960,400/878 - Step 6: Final answer
x = 1,093.85
Related Problems
Find third proportional to 439 and 490
Half scale
Find third proportional to 1,756 and 1,960
Double scale
Find third proportional to 880 and 982
Similar ratio
Find third proportional to 1,317 and 1,470
1.5x scale
Why These Related Problems?
These problems maintain the same ratio (1.12) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.