Finding the Fourth Proportional to 217.28, 325.91 and 108.99
Calculator
Solution
The fourth proportional to 217.28, 325.91 and 108.99 is: 163.48
Step by Step Solution
- Step 1: Write the proportion equation
217.28 : 325.91 = 108.99 : x - Step 2: Convert to fraction form
217.28/325.91 = 108.99/x - Step 3: Cross multiply
217.28x = 325.91 × 108.99 - Step 4: Simplify right side
217.28x = 35,521.20 - Step 5: Solve for x
x = 35,521.20/217.28 - Step 6: Final answer
x = 163.48
Related Problems
Find fourth proportional to 108.64, 162.96 and 54.50
Half scale
Find fourth proportional to 434.57, 651.83 and 217.98
Double scale
Find fourth proportional to 218.28, 327.41 and 109.99
Similar ratio
Find fourth proportional to 325.92, 488.87 and 163.49
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.