Finding the Fourth Proportional to 709,412.18, 979,009.61 and 387,143.08
Calculator
Solution
The fourth proportional to 709,412.18, 979,009.61 and 387,143.08 is: 534,268.80
Step by Step Solution
- Step 1: Write the proportion equation
709,412.18 : 979,009.61 = 387,143.08 : x - Step 2: Convert to fraction form
709,412.18/979,009.61 = 387,143.08/x - Step 3: Cross multiply
709,412.18x = 979,009.61 × 387,143.08 - Step 4: Simplify right side
709,412.18x = 379,016,791,381.76 - Step 5: Solve for x
x = 379,016,791,381.76/709,412.18 - Step 6: Final answer
x = 534,268.80
Related Problems
Find fourth proportional to 354,706.09, 489,504.80 and 193,571.54
Half scale
Find fourth proportional to 1,418,824.35, 1,958,019.21 and 774,286.16
Double scale
Find fourth proportional to 709,413.18, 979,010.99 and 387,144.08
Similar ratio
Find fourth proportional to 1,064,118.26, 1,468,514.41 and 580,714.62
1.5x scale
Why These Related Problems?
These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.