Finding the Fourth Proportional to 226.60, 312.74 and 149
Calculator
Solution
The fourth proportional to 226.60, 312.74 and 149 is: 205.64
Step by Step Solution
- Step 1: Write the proportion equation
226.60 : 312.74 = 149 : x - Step 2: Convert to fraction form
226.60/312.74 = 149/x - Step 3: Cross multiply
226.60x = 312.74 × 149 - Step 4: Simplify right side
226.60x = 46,598.26 - Step 5: Solve for x
x = 46,598.26/226.60 - Step 6: Final answer
x = 205.64
Related Problems
Find fourth proportional to 113.30, 156.37 and 74.50
Half scale
Find fourth proportional to 453.20, 625.48 and 298
Double scale
Find fourth proportional to 227.60, 314.12 and 150
Similar ratio
Find fourth proportional to 339.90, 469.11 and 223.50
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.