Finding the Fourth Proportional to 263,263.21, 394,959.20 and 85,771.15
Calculator
Solution
The fourth proportional to 263,263.21, 394,959.20 and 85,771.15 is: 128,677.70
Step by Step Solution
- Step 1: Write the proportion equation
263,263.21 : 394,959.20 = 85,771.15 : x - Step 2: Convert to fraction form
263,263.21/394,959.20 = 85,771.15/x - Step 3: Cross multiply
263,263.21x = 394,959.20 × 85,771.15 - Step 4: Simplify right side
263,263.21x = 33,876,104,787.08 - Step 5: Solve for x
x = 33,876,104,787.08/263,263.21 - Step 6: Final answer
x = 128,677.70
Related Problems
Find fourth proportional to 131,631.61, 197,479.60 and 42,885.58
Half scale
Find fourth proportional to 526,526.42, 789,918.40 and 171,542.30
Double scale
Find fourth proportional to 263,264.21, 394,960.70 and 85,772.15
Similar ratio
Find fourth proportional to 394,894.82, 592,438.80 and 128,656.73
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.