Finding the Third Proportional to 318 and 406.50
Calculator
Solution
The third proportional to 318 and 406.50 is: 519.63
Step by Step Solution
- Step 1: Write the proportion equation
318 : 406.50 = 406.50 : x - Step 2: Convert to fraction form
318/406.50 = 406.50/x - Step 3: Cross multiply
318x = 406.50 × 406.50 - Step 4: Simplify right side
318x = 165,242.25 - Step 5: Solve for x
x = 165,242.25/318 - Step 6: Final answer
x = 519.63
Related Problems
Find third proportional to 159 and 203.25
Half scale
Find third proportional to 636 and 813
Double scale
Find third proportional to 320 and 409
Similar ratio
Find third proportional to 477 and 609.75
1.5x scale
Why These Related Problems?
These problems maintain the same ratio (1.28) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.