Finding the Fourth Proportional to 253.99, 381.09 and 122.15
Calculator
Solution
The fourth proportional to 253.99, 381.09 and 122.15 is: 183.28
Step by Step Solution
- Step 1: Write the proportion equation
253.99 : 381.09 = 122.15 : x - Step 2: Convert to fraction form
253.99/381.09 = 122.15/x - Step 3: Cross multiply
253.99x = 381.09 × 122.15 - Step 4: Simplify right side
253.99x = 46,550.14 - Step 5: Solve for x
x = 46,550.14/253.99 - Step 6: Final answer
x = 183.28
Related Problems
Find fourth proportional to 127.00, 190.55 and 61.08
Half scale
Find fourth proportional to 507.98, 762.18 and 244.30
Double scale
Find fourth proportional to 254.99, 382.59 and 123.15
Similar ratio
Find fourth proportional to 380.99, 571.64 and 183.23
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.