Finding the Fourth Proportional to 809,418.80, 1,214,128.20 and 388,593.20
Calculator
Solution
The fourth proportional to 809,418.80, 1,214,128.20 and 388,593.20 is: 582,889.80
Step by Step Solution
- Step 1: Write the proportion equation
809,418.80 : 1,214,128.20 = 388,593.20 : x - Step 2: Convert to fraction form
809,418.80/1,214,128.20 = 388,593.20/x - Step 3: Cross multiply
809,418.80x = 1,214,128.20 × 388,593.20 - Step 4: Simplify right side
809,418.80x = 471,801,962,448.24 - Step 5: Solve for x
x = 471,801,962,448.24/809,418.80 - Step 6: Final answer
x = 582,889.80
Related Problems
Find fourth proportional to 404,709.40, 607,064.10 and 194,296.60
Half scale
Find fourth proportional to 1,618,837.60, 2,428,256.40 and 777,186.40
Double scale
Find fourth proportional to 809,419.80, 1,214,129.70 and 388,594.20
Similar ratio
Find fourth proportional to 1,214,128.20, 1,821,192.30 and 582,889.80
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.