Finding the Fourth Proportional to 321,939.10, 482,908.65 and 85,305.70
Calculator
Solution
The fourth proportional to 321,939.10, 482,908.65 and 85,305.70 is: 127,958.55
Step by Step Solution
- Step 1: Write the proportion equation
321,939.10 : 482,908.65 = 85,305.70 : x - Step 2: Convert to fraction form
321,939.10/482,908.65 = 85,305.70/x - Step 3: Cross multiply
321,939.10x = 482,908.65 × 85,305.70 - Step 4: Simplify right side
321,939.10x = 41,194,860,424.31 - Step 5: Solve for x
x = 41,194,860,424.31/321,939.10 - Step 6: Final answer
x = 127,958.55
Related Problems
Find fourth proportional to 160,969.55, 241,454.33 and 42,652.85
Half scale
Find fourth proportional to 643,878.20, 965,817.30 and 170,611.40
Double scale
Find fourth proportional to 321,940.10, 482,910.15 and 85,306.70
Similar ratio
Find fourth proportional to 482,908.65, 724,362.98 and 127,958.55
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.