Finding the Fourth Proportional to 197.20, 272.08 and 142.08
Calculator
Solution
The fourth proportional to 197.20, 272.08 and 142.08 is: 196.03
Step by Step Solution
- Step 1: Write the proportion equation
197.20 : 272.08 = 142.08 : x - Step 2: Convert to fraction form
197.20/272.08 = 142.08/x - Step 3: Cross multiply
197.20x = 272.08 × 142.08 - Step 4: Simplify right side
197.20x = 38,657.13 - Step 5: Solve for x
x = 38,657.13/197.20 - Step 6: Final answer
x = 196.03
Related Problems
Find fourth proportional to 98.60, 136.04 and 71.04
Half scale
Find fourth proportional to 394.40, 544.16 and 284.16
Double scale
Find fourth proportional to 198.20, 273.46 and 143.08
Similar ratio
Find fourth proportional to 295.80, 408.12 and 213.12
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.