Finding the Fourth Proportional to 217.58, 326.15 and 119.99
Calculator
Solution
The fourth proportional to 217.58, 326.15 and 119.99 is: 179.87
Step by Step Solution
- Step 1: Write the proportion equation
217.58 : 326.15 = 119.99 : x - Step 2: Convert to fraction form
217.58/326.15 = 119.99/x - Step 3: Cross multiply
217.58x = 326.15 × 119.99 - Step 4: Simplify right side
217.58x = 39,134.74 - Step 5: Solve for x
x = 39,134.74/217.58 - Step 6: Final answer
x = 179.87
Related Problems
Find fourth proportional to 108.79, 163.08 and 60.00
Half scale
Find fourth proportional to 435.15, 652.30 and 239.98
Double scale
Find fourth proportional to 218.58, 327.65 and 120.99
Similar ratio
Find fourth proportional to 326.36, 489.23 and 179.99
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.