Finding the Fourth Proportional to 2,786.75, 4,180.58 and 912.09
Calculator
Solution
The fourth proportional to 2,786.75, 4,180.58 and 912.09 is: 1,368.28
Step by Step Solution
- Step 1: Write the proportion equation
2,786.75 : 4,180.58 = 912.09 : x - Step 2: Convert to fraction form
2,786.75/4,180.58 = 912.09/x - Step 3: Cross multiply
2,786.75x = 4,180.58 × 912.09 - Step 4: Simplify right side
2,786.75x = 3,813,060.65 - Step 5: Solve for x
x = 3,813,060.65/2,786.75 - Step 6: Final answer
x = 1,368.28
Related Problems
Find fourth proportional to 1,393.37, 2,090.29 and 456.05
Half scale
Find fourth proportional to 5,573.49, 8,361.15 and 1,824.18
Double scale
Find fourth proportional to 2,787.75, 4,182.08 and 913.09
Similar ratio
Find fourth proportional to 4,180.12, 6,270.86 and 1,368.14
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.