Finding the Fourth Proportional to 258,405.19, 387,686.40 and 132,134.09
Calculator
Solution
The fourth proportional to 258,405.19, 387,686.40 and 132,134.09 is: 198,241.33
Step by Step Solution
- Step 1: Write the proportion equation
258,405.19 : 387,686.40 = 132,134.09 : x - Step 2: Convert to fraction form
258,405.19/387,686.40 = 132,134.09/x - Step 3: Cross multiply
258,405.19x = 387,686.40 × 132,134.09 - Step 4: Simplify right side
258,405.19x = 51,226,587,978.70 - Step 5: Solve for x
x = 51,226,587,978.70/258,405.19 - Step 6: Final answer
x = 198,241.33
Related Problems
Find fourth proportional to 129,202.59, 193,843.20 and 66,067.04
Half scale
Find fourth proportional to 516,810.38, 775,372.80 and 264,268.17
Double scale
Find fourth proportional to 258,406.19, 387,687.90 and 132,135.09
Similar ratio
Find fourth proportional to 387,607.78, 581,529.60 and 198,201.13
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.