Finding the Fourth Proportional to 252.41, 378.67 and 79.09
Calculator
Solution
The fourth proportional to 252.41, 378.67 and 79.09 is: 118.65
Step by Step Solution
- Step 1: Write the proportion equation
252.41 : 378.67 = 79.09 : x - Step 2: Convert to fraction form
252.41/378.67 = 79.09/x - Step 3: Cross multiply
252.41x = 378.67 × 79.09 - Step 4: Simplify right side
252.41x = 29,949.01 - Step 5: Solve for x
x = 29,949.01/252.41 - Step 6: Final answer
x = 118.65
Related Problems
Find fourth proportional to 126.21, 189.34 and 39.55
Half scale
Find fourth proportional to 504.82, 757.34 and 158.18
Double scale
Find fourth proportional to 253.41, 380.17 and 80.09
Similar ratio
Find fourth proportional to 378.62, 568.01 and 118.64
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.