Finding the Fourth Proportional to 642,606.68, 886,782.12 and 356,120.62
Calculator
Solution
The fourth proportional to 642,606.68, 886,782.12 and 356,120.62 is: 491,438.09
Step by Step Solution
- Step 1: Write the proportion equation
642,606.68 : 886,782.12 = 356,120.62 : x - Step 2: Convert to fraction form
642,606.68/886,782.12 = 356,120.62/x - Step 3: Cross multiply
642,606.68x = 886,782.12 × 356,120.62 - Step 4: Simplify right side
642,606.68x = 315,801,398,379.31 - Step 5: Solve for x
x = 315,801,398,379.31/642,606.68 - Step 6: Final answer
x = 491,438.09
Related Problems
Find fourth proportional to 321,303.34, 443,391.06 and 178,060.31
Half scale
Find fourth proportional to 1,285,213.36, 1,773,564.24 and 712,241.24
Double scale
Find fourth proportional to 642,607.68, 886,783.50 and 356,121.62
Similar ratio
Find fourth proportional to 963,910.02, 1,330,173.18 and 534,180.93
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.