Finding the Third Proportional to 698 and 1,668
Calculator
Solution
The third proportional to 698 and 1,668 is: 3,985.99
Step by Step Solution
- Step 1: Write the proportion equation
698 : 1,668 = 1,668 : x - Step 2: Convert to fraction form
698/1,668 = 1,668/x - Step 3: Cross multiply
698x = 1,668 × 1,668 - Step 4: Simplify right side
698x = 2,782,224 - Step 5: Solve for x
x = 2,782,224/698 - Step 6: Final answer
x = 3,985.99
Related Problems
Find third proportional to 349 and 834
Half scale
Find third proportional to 1,396 and 3,336
Double scale
Find third proportional to 700 and 1,673
Similar ratio
Find third proportional to 1,047 and 2,502
1.5x scale
Why These Related Problems?
These problems maintain the same ratio (2.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.