Finding the Fourth Proportional to 408,963.80, 613,445.70 and 209,217.80
Calculator
Solution
The fourth proportional to 408,963.80, 613,445.70 and 209,217.80 is: 313,826.70
Step by Step Solution
- Step 1: Write the proportion equation
408,963.80 : 613,445.70 = 209,217.80 : x - Step 2: Convert to fraction form
408,963.80/613,445.70 = 209,217.80/x - Step 3: Cross multiply
408,963.80x = 613,445.70 × 209,217.80 - Step 4: Simplify right side
408,963.80x = 128,343,759,773.46 - Step 5: Solve for x
x = 128,343,759,773.46/408,963.80 - Step 6: Final answer
x = 313,826.70
Related Problems
Find fourth proportional to 204,481.90, 306,722.85 and 104,608.90
Half scale
Find fourth proportional to 817,927.60, 1,226,891.40 and 418,435.60
Double scale
Find fourth proportional to 408,964.80, 613,447.20 and 209,218.80
Similar ratio
Find fourth proportional to 613,445.70, 920,168.55 and 313,826.70
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.