Finding the Third Proportional to 658 and 990.50
Calculator
Solution
The third proportional to 658 and 990.50 is: 1,491.02
Step by Step Solution
- Step 1: Write the proportion equation
658 : 990.50 = 990.50 : x - Step 2: Convert to fraction form
658/990.50 = 990.50/x - Step 3: Cross multiply
658x = 990.50 × 990.50 - Step 4: Simplify right side
658x = 981,090.25 - Step 5: Solve for x
x = 981,090.25/658 - Step 6: Final answer
x = 1,491.02
Related Problems
Find third proportional to 329 and 495.25
Half scale
Find third proportional to 1,316 and 1,981
Double scale
Find third proportional to 660 and 994
Similar ratio
Find third proportional to 987 and 1,485.75
1.5x scale
Why These Related Problems?
These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.