Finding the Third Proportional to 320 and 698.50
Calculator
Solution
The third proportional to 320 and 698.50 is: 1,524.69
Step by Step Solution
- Step 1: Write the proportion equation
320 : 698.50 = 698.50 : x - Step 2: Convert to fraction form
320/698.50 = 698.50/x - Step 3: Cross multiply
320x = 698.50 × 698.50 - Step 4: Simplify right side
320x = 487,902.25 - Step 5: Solve for x
x = 487,902.25/320 - Step 6: Final answer
x = 1,524.69
Related Problems
Find third proportional to 160 and 349.25
Half scale
Find third proportional to 640 and 1,397
Double scale
Find third proportional to 322 and 703
Similar ratio
Find third proportional to 480 and 1,047.75
1.5x scale
Why These Related Problems?
These problems maintain the same ratio (2.18) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.