Finding the Fourth Proportional to 780,969,975.84, 1,077,735,583.98 and 428,551,858.08
Calculator
Solution
The fourth proportional to 780,969,975.84, 1,077,735,583.98 and 428,551,858.08 is: 591,399,927.43
Step by Step Solution
- Step 1: Write the proportion equation
780,969,975.84 : 1,077,735,583.98 = 428,551,858.08 : x - Step 2: Convert to fraction form
780,969,975.84/1,077,735,583.98 = 428,551,858.08/x - Step 3: Cross multiply
780,969,975.84x = 1,077,735,583.98 × 428,551,858.08 - Step 4: Simplify right side
780,969,975.84x = 461,865,587,033,562,880 - Step 5: Solve for x
x = 461,865,587,033,562,880/780,969,975.84 - Step 6: Final answer
x = 591,399,927.43
Related Problems
Find fourth proportional to 390,484,987.92, 538,867,791.99 and 214,275,929.04
Half scale
Find fourth proportional to 1,561,939,951.68, 2,155,471,167.96 and 857,103,716.16
Double scale
Find fourth proportional to 780,969,976.84, 1,077,735,585.36 and 428,551,859.08
Similar ratio
Find fourth proportional to 1,171,454,963.76, 1,616,603,375.97 and 642,827,787.12
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.