Finding the Fourth Proportional to 819,928.20, 1,230,122.70 and 399,217.80
Calculator
Solution
The fourth proportional to 819,928.20, 1,230,122.70 and 399,217.80 is: 598,938.88
Step by Step Solution
- Step 1: Write the proportion equation
819,928.20 : 1,230,122.70 = 399,217.80 : x - Step 2: Convert to fraction form
819,928.20/1,230,122.70 = 399,217.80/x - Step 3: Cross multiply
819,928.20x = 1,230,122.70 × 399,217.80 - Step 4: Simplify right side
819,928.20x = 491,086,878,024.06 - Step 5: Solve for x
x = 491,086,878,024.06/819,928.20 - Step 6: Final answer
x = 598,938.88
Related Problems
Find fourth proportional to 409,964.10, 615,061.35 and 199,608.90
Half scale
Find fourth proportional to 1,639,856.40, 2,460,245.40 and 798,435.60
Double scale
Find fourth proportional to 819,929.20, 1,230,124.20 and 399,218.80
Similar ratio
Find fourth proportional to 1,229,892.30, 1,845,184.05 and 598,826.70
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.