Finding the Fourth Proportional to 821,643.97, 1,233,480.84 and 389,774.38
Calculator
Solution
The fourth proportional to 821,643.97, 1,233,480.84 and 389,774.38 is: 585,143.01
Step by Step Solution
- Step 1: Write the proportion equation
821,643.97 : 1,233,480.84 = 389,774.38 : x - Step 2: Convert to fraction form
821,643.97/1,233,480.84 = 389,774.38/x - Step 3: Cross multiply
821,643.97x = 1,233,480.84 × 389,774.38 - Step 4: Simplify right side
821,643.97x = 480,779,229,652.88 - Step 5: Solve for x
x = 480,779,229,652.88/821,643.97 - Step 6: Final answer
x = 585,143.01
Related Problems
Find fourth proportional to 410,821.99, 616,740.42 and 194,887.19
Half scale
Find fourth proportional to 1,643,287.94, 2,466,961.68 and 779,548.76
Double scale
Find fourth proportional to 821,644.97, 1,233,482.34 and 389,775.38
Similar ratio
Find fourth proportional to 1,232,465.96, 1,850,221.26 and 584,661.57
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.