Finding the Third Proportional to 878 and 1,658
Calculator
Solution
The third proportional to 878 and 1,658 is: 3,130.94
Step by Step Solution
- Step 1: Write the proportion equation
878 : 1,658 = 1,658 : x - Step 2: Convert to fraction form
878/1,658 = 1,658/x - Step 3: Cross multiply
878x = 1,658 × 1,658 - Step 4: Simplify right side
878x = 2,748,964 - Step 5: Solve for x
x = 2,748,964/878 - Step 6: Final answer
x = 3,130.94
Related Problems
Find third proportional to 439 and 829
Half scale
Find third proportional to 1,756 and 3,316
Double scale
Find third proportional to 880 and 1,662
Similar ratio
Find third proportional to 1,317 and 2,487
1.5x scale
Why These Related Problems?
These problems maintain the same ratio (1.89) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.