Finding the Fourth Proportional to 382.13, 573.26 and 138.68
Calculator
Solution
The fourth proportional to 382.13, 573.26 and 138.68 is: 208.04
Step by Step Solution
- Step 1: Write the proportion equation
382.13 : 573.26 = 138.68 : x - Step 2: Convert to fraction form
382.13/573.26 = 138.68/x - Step 3: Cross multiply
382.13x = 573.26 × 138.68 - Step 4: Simplify right side
382.13x = 79,496.14 - Step 5: Solve for x
x = 79,496.14/382.13 - Step 6: Final answer
x = 208.04
Related Problems
Find fourth proportional to 191.06, 286.63 and 69.34
Half scale
Find fourth proportional to 764.25, 1,146.51 and 277.35
Double scale
Find fourth proportional to 383.13, 574.76 and 139.68
Similar ratio
Find fourth proportional to 573.19, 859.88 and 208.01
1.5x scale
Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.