Finding the Third Proportional to 693 and 1,221
Calculator
Solution
The third proportional to 693 and 1,221 is: 2,151.29
Step by Step Solution
- Step 1: Write the proportion equation
693 : 1,221 = 1,221 : x - Step 2: Convert to fraction form
693/1,221 = 1,221/x - Step 3: Cross multiply
693x = 1,221 × 1,221 - Step 4: Simplify right side
693x = 1,490,841 - Step 5: Solve for x
x = 1,490,841/693 - Step 6: Final answer
x = 2,151.29
Related Problems
Find third proportional to 346.50 and 610.50
Half scale
Find third proportional to 1,386 and 2,442
Double scale
Find third proportional to 695 and 1,225
Similar ratio
Find third proportional to 1,039.50 and 1,831.50
1.5x scale
Why These Related Problems?
These problems maintain the same ratio (1.76) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.