Finding the Fourth Proportional to 644,391.23, 889,161.05 and 372,406.61
Calculator
Solution
The fourth proportional to 644,391.23, 889,161.05 and 372,406.61 is: 513,863.99
Step by Step Solution
- Step 1: Write the proportion equation
644,391.23 : 889,161.05 = 372,406.61 : x - Step 2: Convert to fraction form
644,391.23/889,161.05 = 372,406.61/x - Step 3: Cross multiply
644,391.23x = 889,161.05 × 372,406.61 - Step 4: Simplify right side
644,391.23x = 331,129,448,859.75 - Step 5: Solve for x
x = 331,129,448,859.75/644,391.23 - Step 6: Final answer
x = 513,863.99
Related Problems
Find fourth proportional to 322,195.62, 444,580.53 and 186,203.30
Half scale
Find fourth proportional to 1,288,782.47, 1,778,322.11 and 744,813.21
Double scale
Find fourth proportional to 644,392.23, 889,162.43 and 372,407.61
Similar ratio
Find fourth proportional to 966,586.85, 1,333,741.58 and 558,609.91
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.