Finding the Third Proportional to 390 and 632
Calculator
Solution
The third proportional to 390 and 632 is: 1,024.16
Step by Step Solution
- Step 1: Write the proportion equation
390 : 632 = 632 : x - Step 2: Convert to fraction form
390/632 = 632/x - Step 3: Cross multiply
390x = 632 × 632 - Step 4: Simplify right side
390x = 399,424 - Step 5: Solve for x
x = 399,424/390 - Step 6: Final answer
x = 1,024.16
Related Problems
Find third proportional to 195 and 316
Half scale
Find third proportional to 780 and 1,264
Double scale
Find third proportional to 392 and 635
Similar ratio
Find third proportional to 585 and 948
1.5x scale
Why These Related Problems?
These problems maintain the same ratio (1.62) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.