Finding the Fourth Proportional to 839,811,069.20, 1,259,716,603.80 and 431,664,381.20
Calculator
Solution
The fourth proportional to 839,811,069.20, 1,259,716,603.80 and 431,664,381.20 is: 647,496,571.80
Step by Step Solution
- Step 1: Write the proportion equation
839,811,069.20 : 1,259,716,603.80 = 431,664,381.20 : x - Step 2: Convert to fraction form
839,811,069.20/1,259,716,603.80 = 431,664,381.20/x - Step 3: Cross multiply
839,811,069.20x = 1,259,716,603.80 × 431,664,381.20 - Step 4: Simplify right side
839,811,069.20x = 543,774,788,266,692,544 - Step 5: Solve for x
x = 543,774,788,266,692,544/839,811,069.20 - Step 6: Final answer
x = 647,496,571.80
Related Problems
Find fourth proportional to 419,905,534.60, 629,858,301.90 and 215,832,190.60
Half scale
Find fourth proportional to 1,679,622,138.40, 2,519,433,207.60 and 863,328,762.40
Double scale
Find fourth proportional to 839,811,070.20, 1,259,716,605.30 and 431,664,382.20
Similar ratio
Find fourth proportional to 1,259,716,603.80, 1,889,574,905.70 and 647,496,571.80
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.