Finding the Fourth Proportional to 643,213.74, 887,689.50 and 356,826.09
Calculator
Solution
The fourth proportional to 643,213.74, 887,689.50 and 356,826.09 is: 492,450.26
Step by Step Solution
- Step 1: Write the proportion equation
643,213.74 : 887,689.50 = 356,826.09 : x - Step 2: Convert to fraction form
643,213.74/887,689.50 = 356,826.09/x - Step 3: Cross multiply
643,213.74x = 887,689.50 × 356,826.09 - Step 4: Simplify right side
643,213.74x = 316,750,775,409.79 - Step 5: Solve for x
x = 316,750,775,409.79/643,213.74 - Step 6: Final answer
x = 492,450.26
Related Problems
Find fourth proportional to 321,606.87, 443,844.75 and 178,413.05
Half scale
Find fourth proportional to 1,286,427.49, 1,775,378.99 and 713,652.19
Double scale
Find fourth proportional to 643,214.74, 887,690.88 and 356,827.09
Similar ratio
Find fourth proportional to 964,820.62, 1,331,534.24 and 535,239.14
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.