Finding the Fourth Proportional to 226.19, 312.21 and 138.84
Calculator
Solution
The fourth proportional to 226.19, 312.21 and 138.84 is: 191.65
Step by Step Solution
- Step 1: Write the proportion equation
226.19 : 312.21 = 138.84 : x - Step 2: Convert to fraction form
226.19/312.21 = 138.84/x - Step 3: Cross multiply
226.19x = 312.21 × 138.84 - Step 4: Simplify right side
226.19x = 43,347.24 - Step 5: Solve for x
x = 43,347.24/226.19 - Step 6: Final answer
x = 191.65
Related Problems
Find fourth proportional to 113.09, 156.11 and 69.42
Half scale
Find fourth proportional to 452.37, 624.42 and 277.68
Double scale
Find fourth proportional to 227.19, 313.59 and 139.84
Similar ratio
Find fourth proportional to 339.28, 468.32 and 208.26
1.5x scale
Why These Related Problems?
These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.