Finding the Fourth Proportional to 621,686.42, 857,850.60 and 392,157.08
Calculator
Solution
The fourth proportional to 621,686.42, 857,850.60 and 392,157.08 is: 541,128.41
Step by Step Solution
- Step 1: Write the proportion equation
621,686.42 : 857,850.60 = 392,157.08 : x - Step 2: Convert to fraction form
621,686.42/857,850.60 = 392,157.08/x - Step 3: Cross multiply
621,686.42x = 857,850.60 × 392,157.08 - Step 4: Simplify right side
621,686.42x = 336,412,186,372.25 - Step 5: Solve for x
x = 336,412,186,372.25/621,686.42 - Step 6: Final answer
x = 541,128.41
Related Problems
Find fourth proportional to 310,843.21, 428,925.30 and 196,078.54
Half scale
Find fourth proportional to 1,243,372.84, 1,715,701.20 and 784,314.16
Double scale
Find fourth proportional to 621,687.42, 857,851.98 and 392,158.08
Similar ratio
Find fourth proportional to 932,529.63, 1,286,775.90 and 588,235.62
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.