Finding the Fourth Proportional to 197.75, 296.62 and 129.70
Calculator
Solution
The fourth proportional to 197.75, 296.62 and 129.70 is: 194.55
Step by Step Solution
- Step 1: Write the proportion equation
197.75 : 296.62 = 129.70 : x - Step 2: Convert to fraction form
197.75/296.62 = 129.70/x - Step 3: Cross multiply
197.75x = 296.62 × 129.70 - Step 4: Simplify right side
197.75x = 38,472.68 - Step 5: Solve for x
x = 38,472.68/197.75 - Step 6: Final answer
x = 194.55
Related Problems
Find fourth proportional to 98.87, 148.31 and 64.85
Half scale
Find fourth proportional to 395.50, 593.25 and 259.41
Double scale
Find fourth proportional to 198.75, 298.12 and 130.70
Similar ratio
Find fourth proportional to 296.62, 444.93 and 194.55
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.