Finding the Third Proportional to 991 and 1,758
Calculator
Solution
The third proportional to 991 and 1,758 is: 3,118.63
Step by Step Solution
- Step 1: Write the proportion equation
991 : 1,758 = 1,758 : x - Step 2: Convert to fraction form
991/1,758 = 1,758/x - Step 3: Cross multiply
991x = 1,758 × 1,758 - Step 4: Simplify right side
991x = 3,090,564 - Step 5: Solve for x
x = 3,090,564/991 - Step 6: Final answer
x = 3,118.63
Related Problems
Find third proportional to 495.50 and 879
Half scale
Find third proportional to 1,982 and 3,516
Double scale
Find third proportional to 993 and 1,762
Similar ratio
Find third proportional to 1,486.50 and 2,637
1.5x scale
Why These Related Problems?
These problems maintain the same ratio (1.77) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.