Finding the Fourth Proportional to 419,134.55, 628,702.02 and 138,651.80
Calculator
Solution
The fourth proportional to 419,134.55, 628,702.02 and 138,651.80 is: 207,977.76
Step by Step Solution
- Step 1: Write the proportion equation
419,134.55 : 628,702.02 = 138,651.80 : x - Step 2: Convert to fraction form
419,134.55/628,702.02 = 138,651.80/x - Step 3: Cross multiply
419,134.55x = 628,702.02 × 138,651.80 - Step 4: Simplify right side
419,134.55x = 87,170,663,593.13 - Step 5: Solve for x
x = 87,170,663,593.13/419,134.55 - Step 6: Final answer
x = 207,977.76
Related Problems
Find fourth proportional to 209,567.27, 314,351.01 and 69,325.90
Half scale
Find fourth proportional to 838,269.09, 1,257,404.04 and 277,303.59
Double scale
Find fourth proportional to 419,135.55, 628,703.52 and 138,652.80
Similar ratio
Find fourth proportional to 628,701.82, 943,053.03 and 207,977.69
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.