Finding the Fourth Proportional to 239.12, 329.18 and 207.60
Calculator
Solution
The fourth proportional to 239.12, 329.18 and 207.60 is: 285.79
Step by Step Solution
- Step 1: Write the proportion equation
239.12 : 329.18 = 207.60 : x - Step 2: Convert to fraction form
239.12/329.18 = 207.60/x - Step 3: Cross multiply
239.12x = 329.18 × 207.60 - Step 4: Simplify right side
239.12x = 68,336.73 - Step 5: Solve for x
x = 68,336.73/239.12 - Step 6: Final answer
x = 285.79
Related Problems
Find fourth proportional to 119.56, 164.59 and 103.80
Half scale
Find fourth proportional to 478.23, 658.35 and 415.20
Double scale
Find fourth proportional to 240.12, 330.55 and 208.60
Similar ratio
Find fourth proportional to 358.67, 493.76 and 311.40
1.5x scale
Why These Related Problems?
These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.