Finding the Fourth Proportional to 870,872.70, 1,306,391.49 and 338,434.80
Calculator
Solution
The fourth proportional to 870,872.70, 1,306,391.49 and 338,434.80 is: 507,684.24
Step by Step Solution
- Step 1: Write the proportion equation
870,872.70 : 1,306,391.49 = 338,434.80 : x - Step 2: Convert to fraction form
870,872.70/1,306,391.49 = 338,434.80/x - Step 3: Cross multiply
870,872.70x = 1,306,391.49 × 338,434.80 - Step 4: Simplify right side
870,872.70x = 442,128,342,639.85 - Step 5: Solve for x
x = 442,128,342,639.85/870,872.70 - Step 6: Final answer
x = 507,684.24
Related Problems
Find fourth proportional to 435,436.35, 653,195.75 and 169,217.40
Half scale
Find fourth proportional to 1,741,745.40, 2,612,782.98 and 676,869.60
Double scale
Find fourth proportional to 870,873.70, 1,306,392.99 and 338,435.80
Similar ratio
Find fourth proportional to 1,306,309.05, 1,959,587.24 and 507,652.20
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.