Finding the Fourth Proportional to 268.99, 403.49 and 76.62
Calculator
Solution
The fourth proportional to 268.99, 403.49 and 76.62 is: 114.92
Step by Step Solution
- Step 1: Write the proportion equation
268.99 : 403.49 = 76.62 : x - Step 2: Convert to fraction form
268.99/403.49 = 76.62/x - Step 3: Cross multiply
268.99x = 403.49 × 76.62 - Step 4: Simplify right side
268.99x = 30,913.00 - Step 5: Solve for x
x = 30,913.00/268.99 - Step 6: Final answer
x = 114.92
Related Problems
Find fourth proportional to 134.50, 201.74 and 38.31
Half scale
Find fourth proportional to 537.98, 806.97 and 153.23
Double scale
Find fourth proportional to 269.99, 404.99 and 77.62
Similar ratio
Find fourth proportional to 403.49, 605.23 and 114.92
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.