Finding the Fourth Proportional to 394,138.75, 543,913.67 and 215,290.75
Calculator
Solution
The fourth proportional to 394,138.75, 543,913.67 and 215,290.75 is: 297,102.43
Step by Step Solution
- Step 1: Write the proportion equation
394,138.75 : 543,913.67 = 215,290.75 : x - Step 2: Convert to fraction form
394,138.75/543,913.67 = 215,290.75/x - Step 3: Cross multiply
394,138.75x = 543,913.67 × 215,290.75 - Step 4: Simplify right side
394,138.75x = 117,099,580,873.10 - Step 5: Solve for x
x = 117,099,580,873.10/394,138.75 - Step 6: Final answer
x = 297,102.43
Related Problems
Find fourth proportional to 197,069.38, 271,956.83 and 107,645.38
Half scale
Find fourth proportional to 788,277.50, 1,087,827.33 and 430,581.50
Double scale
Find fourth proportional to 394,139.75, 543,915.05 and 215,291.75
Similar ratio
Find fourth proportional to 591,208.13, 815,870.50 and 322,936.13
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.