Finding the Fourth Proportional to 199.36, 299.10 and 77.62
Calculator
Solution
The fourth proportional to 199.36, 299.10 and 77.62 is: 116.45
Step by Step Solution
- Step 1: Write the proportion equation
199.36 : 299.10 = 77.62 : x - Step 2: Convert to fraction form
199.36/299.10 = 77.62/x - Step 3: Cross multiply
199.36x = 299.10 × 77.62 - Step 4: Simplify right side
199.36x = 23,216.14 - Step 5: Solve for x
x = 23,216.14/199.36 - Step 6: Final answer
x = 116.45
Related Problems
Find fourth proportional to 99.68, 149.55 and 38.81
Half scale
Find fourth proportional to 398.72, 598.20 and 155.24
Double scale
Find fourth proportional to 200.36, 300.60 and 78.62
Similar ratio
Find fourth proportional to 299.04, 448.65 and 116.43
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.