Finding the Fourth Proportional to 201.70, 302.10 and 155.80
Calculator
Solution
The fourth proportional to 201.70, 302.10 and 155.80 is: 233.35
Step by Step Solution
- Step 1: Write the proportion equation
201.70 : 302.10 = 155.80 : x - Step 2: Convert to fraction form
201.70/302.10 = 155.80/x - Step 3: Cross multiply
201.70x = 302.10 × 155.80 - Step 4: Simplify right side
201.70x = 47,067.18 - Step 5: Solve for x
x = 47,067.18/201.70 - Step 6: Final answer
x = 233.35
Related Problems
Find fourth proportional to 100.85, 151.05 and 77.90
Half scale
Find fourth proportional to 403.40, 604.20 and 311.60
Double scale
Find fourth proportional to 202.70, 303.60 and 156.80
Similar ratio
Find fourth proportional to 302.55, 453.15 and 233.70
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.