Finding the Fourth Proportional to 392.85, 588.79 and 343.99
Calculator
Solution
The fourth proportional to 392.85, 588.79 and 343.99 is: 515.56
Step by Step Solution
- Step 1: Write the proportion equation
392.85 : 588.79 = 343.99 : x - Step 2: Convert to fraction form
392.85/588.79 = 343.99/x - Step 3: Cross multiply
392.85x = 588.79 × 343.99 - Step 4: Simplify right side
392.85x = 202,536.15 - Step 5: Solve for x
x = 202,536.15/392.85 - Step 6: Final answer
x = 515.56
Related Problems
Find fourth proportional to 196.43, 294.39 and 172.00
Half scale
Find fourth proportional to 785.70, 1,177.57 and 687.98
Double scale
Find fourth proportional to 393.85, 590.28 and 344.99
Similar ratio
Find fourth proportional to 589.28, 883.18 and 515.99
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.