Finding the Third Proportional to 78 and 204.50
Calculator
Solution
The third proportional to 78 and 204.50 is: 536.16
Step by Step Solution
- Step 1: Write the proportion equation
78 : 204.50 = 204.50 : x - Step 2: Convert to fraction form
78/204.50 = 204.50/x - Step 3: Cross multiply
78x = 204.50 × 204.50 - Step 4: Simplify right side
78x = 41,820.25 - Step 5: Solve for x
x = 41,820.25/78 - Step 6: Final answer
x = 536.16
Related Problems
Find third proportional to 39 and 102.25
Half scale
Find third proportional to 156 and 409
Double scale
Find third proportional to 80 and 210
Similar ratio
Find third proportional to 117 and 306.75
1.5x scale
Why These Related Problems?
These problems maintain the same ratio (2.62) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.