Finding the Third Proportional to 257,571.14 and 378,640.20
Calculator
Solution
The third proportional to 257,571.14 and 378,640.20 is: 556,616.70
Step by Step Solution
- Step 1: Write the proportion equation
257,571.14 : 378,640.20 = 378,640.20 : x - Step 2: Convert to fraction form
257,571.14/378,640.20 = 378,640.20/x - Step 3: Cross multiply
257,571.14x = 378,640.20 × 378,640.20 - Step 4: Simplify right side
257,571.14x = 143,368,397,506.29 - Step 5: Solve for x
x = 143,368,397,506.29/257,571.14 - Step 6: Final answer
x = 556,616.70
Related Problems
Find third proportional to 128,785.57 and 189,320.10
Half scale
Find third proportional to 515,142.28 and 757,280.39
Double scale
Find third proportional to 257,573 and 378,643
Similar ratio
Find third proportional to 386,356.71 and 567,960.29
1.5x scale
Why These Related Problems?
These problems maintain the same ratio (1.47) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.