Finding the Fourth Proportional to 628,993,972.80, 943,490,959.20 and 445,327,963.20
Calculator
Solution
The fourth proportional to 628,993,972.80, 943,490,959.20 and 445,327,963.20 is: 667,991,944.80
Step by Step Solution
- Step 1: Write the proportion equation
628,993,972.80 : 943,490,959.20 = 445,327,963.20 : x - Step 2: Convert to fraction form
628,993,972.80/943,490,959.20 = 445,327,963.20/x - Step 3: Cross multiply
628,993,972.80x = 943,490,959.20 × 445,327,963.20 - Step 4: Simplify right side
628,993,972.80x = 420,162,907,158,150,336 - Step 5: Solve for x
x = 420,162,907,158,150,336/628,993,972.80 - Step 6: Final answer
x = 667,991,944.80
Related Problems
Find fourth proportional to 314,496,986.40, 471,745,479.60 and 222,663,981.60
Half scale
Find fourth proportional to 1,257,987,945.60, 1,886,981,918.40 and 890,655,926.40
Double scale
Find fourth proportional to 628,993,973.80, 943,490,960.70 and 445,327,964.20
Similar ratio
Find fourth proportional to 943,490,959.20, 1,415,236,438.80 and 667,991,944.80
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.