Finding the Fourth Proportional to 511,135.76, 765,720.99 and 285,812.79
Calculator
Solution
The fourth proportional to 511,135.76, 765,720.99 and 285,812.79 is: 428,169.71
Step by Step Solution
- Step 1: Write the proportion equation
511,135.76 : 765,720.99 = 285,812.79 : x - Step 2: Convert to fraction form
511,135.76/765,720.99 = 285,812.79/x - Step 3: Cross multiply
511,135.76x = 765,720.99 × 285,812.79 - Step 4: Simplify right side
511,135.76x = 218,852,852,513.46 - Step 5: Solve for x
x = 218,852,852,513.46/511,135.76 - Step 6: Final answer
x = 428,169.71
Related Problems
Find fourth proportional to 255,567.88, 382,860.50 and 142,906.40
Half scale
Find fourth proportional to 1,022,271.52, 1,531,441.98 and 571,625.58
Double scale
Find fourth proportional to 511,136.76, 765,722.49 and 285,813.79
Similar ratio
Find fourth proportional to 766,703.64, 1,148,581.49 and 428,719.19
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.