Finding the Fourth Proportional to 338.17, 506.95 and 121.70
Calculator
Solution
The fourth proportional to 338.17, 506.95 and 121.70 is: 182.43
Step by Step Solution
- Step 1: Write the proportion equation
338.17 : 506.95 = 121.70 : x - Step 2: Convert to fraction form
338.17/506.95 = 121.70/x - Step 3: Cross multiply
338.17x = 506.95 × 121.70 - Step 4: Simplify right side
338.17x = 61,692.67 - Step 5: Solve for x
x = 61,692.67/338.17 - Step 6: Final answer
x = 182.43
Related Problems
Find fourth proportional to 169.09, 253.47 and 60.85
Half scale
Find fourth proportional to 676.34, 1,013.89 and 243.39
Double scale
Find fourth proportional to 339.17, 508.44 and 122.70
Similar ratio
Find fourth proportional to 507.26, 760.42 and 182.54
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.