Finding the Fourth Proportional to 225,505.93, 311,120.92 and 128,640.19
Calculator
Solution
The fourth proportional to 225,505.93, 311,120.92 and 128,640.19 is: 177,479.39
Step by Step Solution
- Step 1: Write the proportion equation
225,505.93 : 311,120.92 = 128,640.19 : x - Step 2: Convert to fraction form
225,505.93/311,120.92 = 128,640.19/x - Step 3: Cross multiply
225,505.93x = 311,120.92 × 128,640.19 - Step 4: Simplify right side
225,505.93x = 40,022,654,261.77 - Step 5: Solve for x
x = 40,022,654,261.77/225,505.93 - Step 6: Final answer
x = 177,479.39
Related Problems
Find fourth proportional to 112,752.97, 155,560.46 and 64,320.10
Half scale
Find fourth proportional to 451,011.86, 622,241.84 and 257,280.38
Double scale
Find fourth proportional to 225,506.93, 311,122.30 and 128,641.19
Similar ratio
Find fourth proportional to 338,258.90, 466,681.38 and 192,960.29
1.5x scale
Why These Related Problems?
These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.