Finding the Third Proportional to 481 and 642.50
Calculator
Solution
The third proportional to 481 and 642.50 is: 858.23
Step by Step Solution
- Step 1: Write the proportion equation
481 : 642.50 = 642.50 : x - Step 2: Convert to fraction form
481/642.50 = 642.50/x - Step 3: Cross multiply
481x = 642.50 × 642.50 - Step 4: Simplify right side
481x = 412,806.25 - Step 5: Solve for x
x = 412,806.25/481 - Step 6: Final answer
x = 858.23
Related Problems
Find third proportional to 240.50 and 321.25
Half scale
Find third proportional to 962 and 1,285
Double scale
Find third proportional to 483 and 645
Similar ratio
Find third proportional to 721.50 and 963.75
1.5x scale
Why These Related Problems?
These problems maintain the same ratio (1.34) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.