Finding the Fourth Proportional to 251,405.20, 377,107.80 and 139,430.80
Calculator
Solution
The fourth proportional to 251,405.20, 377,107.80 and 139,430.80 is: 209,146.20
Step by Step Solution
- Step 1: Write the proportion equation
251,405.20 : 377,107.80 = 139,430.80 : x - Step 2: Convert to fraction form
251,405.20/377,107.80 = 139,430.80/x - Step 3: Cross multiply
251,405.20x = 377,107.80 × 139,430.80 - Step 4: Simplify right side
251,405.20x = 52,580,442,240.24 - Step 5: Solve for x
x = 52,580,442,240.24/251,405.20 - Step 6: Final answer
x = 209,146.20
Related Problems
Find fourth proportional to 125,702.60, 188,553.90 and 69,715.40
Half scale
Find fourth proportional to 502,810.40, 754,215.60 and 278,861.60
Double scale
Find fourth proportional to 251,406.20, 377,109.30 and 139,431.80
Similar ratio
Find fourth proportional to 377,107.80, 565,661.70 and 209,146.20
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.