Finding the Fourth Proportional to 361.05, 542.08 and 198.84
Calculator
Solution
The fourth proportional to 361.05, 542.08 and 198.84 is: 298.54
Step by Step Solution
- Step 1: Write the proportion equation
361.05 : 542.08 = 198.84 : x - Step 2: Convert to fraction form
361.05/542.08 = 198.84/x - Step 3: Cross multiply
361.05x = 542.08 × 198.84 - Step 4: Simplify right side
361.05x = 107,787.19 - Step 5: Solve for x
x = 107,787.19/361.05 - Step 6: Final answer
x = 298.54
Related Problems
Find fourth proportional to 180.53, 271.04 and 99.42
Half scale
Find fourth proportional to 722.10, 1,084.16 and 397.68
Double scale
Find fourth proportional to 362.05, 543.58 and 199.84
Similar ratio
Find fourth proportional to 541.58, 813.12 and 298.26
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.