Finding the Third Proportional to 69 and 169.50
Calculator
Solution
The third proportional to 69 and 169.50 is: 416.38
Step by Step Solution
- Step 1: Write the proportion equation
69 : 169.50 = 169.50 : x - Step 2: Convert to fraction form
69/169.50 = 169.50/x - Step 3: Cross multiply
69x = 169.50 × 169.50 - Step 4: Simplify right side
69x = 28,730.25 - Step 5: Solve for x
x = 28,730.25/69 - Step 6: Final answer
x = 416.38
Related Problems
Find third proportional to 34.50 and 84.75
Half scale
Find third proportional to 138 and 339
Double scale
Find third proportional to 71 and 174
Similar ratio
Find third proportional to 103.50 and 254.25
1.5x scale
Why These Related Problems?
These problems maintain the same ratio (2.46) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.