Finding the Fourth Proportional to 171.26, 257.07 and 75.14
Calculator
Solution
The fourth proportional to 171.26, 257.07 and 75.14 is: 112.79
Step by Step Solution
- Step 1: Write the proportion equation
171.26 : 257.07 = 75.14 : x - Step 2: Convert to fraction form
171.26/257.07 = 75.14/x - Step 3: Cross multiply
171.26x = 257.07 × 75.14 - Step 4: Simplify right side
171.26x = 19,316.24 - Step 5: Solve for x
x = 19,316.24/171.26 - Step 6: Final answer
x = 112.79
Related Problems
Find fourth proportional to 85.63, 128.54 and 37.57
Half scale
Find fourth proportional to 342.52, 514.14 and 150.28
Double scale
Find fourth proportional to 172.26, 258.57 and 76.14
Similar ratio
Find fourth proportional to 256.89, 385.61 and 112.71
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.