Finding the Third Proportional to 388 and 432
Calculator
Solution
The third proportional to 388 and 432 is: 480.99
Step by Step Solution
- Step 1: Write the proportion equation
388 : 432 = 432 : x - Step 2: Convert to fraction form
388/432 = 432/x - Step 3: Cross multiply
388x = 432 × 432 - Step 4: Simplify right side
388x = 186,624 - Step 5: Solve for x
x = 186,624/388 - Step 6: Final answer
x = 480.99
Related Problems
Find third proportional to 194 and 216
Half scale
Find third proportional to 776 and 864
Double scale
Find third proportional to 390 and 434
Similar ratio
Find third proportional to 582 and 648
1.5x scale
Why These Related Problems?
These problems maintain the same ratio (1.11) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.