Finding the Fourth Proportional to 812,904.06, 1,121,786.79 and 445,378.62
Calculator
Solution
The fourth proportional to 812,904.06, 1,121,786.79 and 445,378.62 is: 614,611.09
Step by Step Solution
- Step 1: Write the proportion equation
812,904.06 : 1,121,786.79 = 445,378.62 : x - Step 2: Convert to fraction form
812,904.06/1,121,786.79 = 445,378.62/x - Step 3: Cross multiply
812,904.06x = 1,121,786.79 × 445,378.62 - Step 4: Simplify right side
812,904.06x = 499,619,852,464.43 - Step 5: Solve for x
x = 499,619,852,464.43/812,904.06 - Step 6: Final answer
x = 614,611.09
Related Problems
Find fourth proportional to 406,452.03, 560,893.40 and 222,689.31
Half scale
Find fourth proportional to 1,625,808.12, 2,243,573.58 and 890,757.24
Double scale
Find fourth proportional to 812,905.06, 1,121,788.17 and 445,379.62
Similar ratio
Find fourth proportional to 1,219,356.09, 1,682,680.19 and 668,067.93
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.