Finding the Fourth Proportional to 643,739.50, 965,375.97 and 288,570.70
Calculator
Solution
The fourth proportional to 643,739.50, 965,375.97 and 288,570.70 is: 432,751.48
Step by Step Solution
- Step 1: Write the proportion equation
643,739.50 : 965,375.97 = 288,570.70 : x - Step 2: Convert to fraction form
643,739.50/965,375.97 = 288,570.70/x - Step 3: Cross multiply
643,739.50x = 965,375.97 × 288,570.70 - Step 4: Simplify right side
643,739.50x = 278,579,219,426.08 - Step 5: Solve for x
x = 278,579,219,426.08/643,739.50 - Step 6: Final answer
x = 432,751.48
Related Problems
Find fourth proportional to 321,869.75, 482,687.99 and 144,285.35
Half scale
Find fourth proportional to 1,287,479, 1,930,751.94 and 577,141.40
Double scale
Find fourth proportional to 643,740.50, 965,377.47 and 288,571.70
Similar ratio
Find fourth proportional to 965,609.25, 1,448,063.96 and 432,856.05
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.