Finding the Third Proportional to 998 and 1,320
Calculator
Solution
The third proportional to 998 and 1,320 is: 1,745.89
Step by Step Solution
- Step 1: Write the proportion equation
998 : 1,320 = 1,320 : x - Step 2: Convert to fraction form
998/1,320 = 1,320/x - Step 3: Cross multiply
998x = 1,320 × 1,320 - Step 4: Simplify right side
998x = 1,742,400 - Step 5: Solve for x
x = 1,742,400/998 - Step 6: Final answer
x = 1,745.89
Related Problems
Find third proportional to 499 and 660
Half scale
Find third proportional to 1,996 and 2,640
Double scale
Find third proportional to 1,000 and 1,323
Similar ratio
Find third proportional to 1,497 and 1,980
1.5x scale
Why These Related Problems?
These problems maintain the same ratio (1.32) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.