Finding the Fourth Proportional to 338.92, 508.36 and 107.80
Calculator
Solution
The fourth proportional to 338.92, 508.36 and 107.80 is: 161.69
Step by Step Solution
- Step 1: Write the proportion equation
338.92 : 508.36 = 107.80 : x - Step 2: Convert to fraction form
338.92/508.36 = 107.80/x - Step 3: Cross multiply
338.92x = 508.36 × 107.80 - Step 4: Simplify right side
338.92x = 54,801.21 - Step 5: Solve for x
x = 54,801.21/338.92 - Step 6: Final answer
x = 161.69
Related Problems
Find fourth proportional to 169.46, 254.18 and 53.90
Half scale
Find fourth proportional to 677.84, 1,016.72 and 215.60
Double scale
Find fourth proportional to 339.92, 509.86 and 108.80
Similar ratio
Find fourth proportional to 508.38, 762.54 and 161.70
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.