Finding the Fourth Proportional to 409,438.20, 614,243.70 and 128,983.80
Calculator
Solution
The fourth proportional to 409,438.20, 614,243.70 and 128,983.80 is: 193,502.92
Step by Step Solution
- Step 1: Write the proportion equation
409,438.20 : 614,243.70 = 128,983.80 : x - Step 2: Convert to fraction form
409,438.20/614,243.70 = 128,983.80/x - Step 3: Cross multiply
409,438.20x = 614,243.70 × 128,983.80 - Step 4: Simplify right side
409,438.20x = 79,227,486,552.06 - Step 5: Solve for x
x = 79,227,486,552.06/409,438.20 - Step 6: Final answer
x = 193,502.92
Related Problems
Find fourth proportional to 204,719.10, 307,121.85 and 64,491.90
Half scale
Find fourth proportional to 818,876.40, 1,228,487.40 and 257,967.60
Double scale
Find fourth proportional to 409,439.20, 614,245.20 and 128,984.80
Similar ratio
Find fourth proportional to 614,157.30, 921,365.55 and 193,475.70
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.