Finding the Third Proportional to 64 and 71.50
Calculator
Solution
The third proportional to 64 and 71.50 is: 79.88
Step by Step Solution
- Step 1: Write the proportion equation
64 : 71.50 = 71.50 : x - Step 2: Convert to fraction form
64/71.50 = 71.50/x - Step 3: Cross multiply
64x = 71.50 × 71.50 - Step 4: Simplify right side
64x = 5,112.25 - Step 5: Solve for x
x = 5,112.25/64 - Step 6: Final answer
x = 79.88
Related Problems
Find third proportional to 32 and 35.75
Half scale
Find third proportional to 128 and 143
Double scale
Find third proportional to 66 and 74
Similar ratio
Find third proportional to 96 and 107.25
1.5x scale
Why These Related Problems?
These problems maintain the same ratio (1.12) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.