Finding the Fourth Proportional to 309.94, 464.99 and 115
Calculator
Solution
The fourth proportional to 309.94, 464.99 and 115 is: 172.53
Step by Step Solution
- Step 1: Write the proportion equation
309.94 : 464.99 = 115 : x - Step 2: Convert to fraction form
309.94/464.99 = 115/x - Step 3: Cross multiply
309.94x = 464.99 × 115 - Step 4: Simplify right side
309.94x = 53,473.28 - Step 5: Solve for x
x = 53,473.28/309.94 - Step 6: Final answer
x = 172.53
Related Problems
Find fourth proportional to 154.97, 232.49 and 57.50
Half scale
Find fourth proportional to 619.88, 929.97 and 230
Double scale
Find fourth proportional to 310.94, 466.49 and 116
Similar ratio
Find fourth proportional to 464.91, 697.48 and 172.50
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.