Finding the Fourth Proportional to 249.63, 374.20 and 84.98
Calculator
Solution
The fourth proportional to 249.63, 374.20 and 84.98 is: 127.39
Step by Step Solution
- Step 1: Write the proportion equation
249.63 : 374.20 = 84.98 : x - Step 2: Convert to fraction form
249.63/374.20 = 84.98/x - Step 3: Cross multiply
249.63x = 374.20 × 84.98 - Step 4: Simplify right side
249.63x = 31,800.24 - Step 5: Solve for x
x = 31,800.24/249.63 - Step 6: Final answer
x = 127.39
Related Problems
Find fourth proportional to 124.82, 187.10 and 42.49
Half scale
Find fourth proportional to 499.26, 748.40 and 169.97
Double scale
Find fourth proportional to 250.63, 375.70 and 85.98
Similar ratio
Find fourth proportional to 374.45, 561.30 and 127.47
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.