Finding the Fourth Proportional to 214,691.20, 321,908.80 and 131,644.80
Calculator
Solution
The fourth proportional to 214,691.20, 321,908.80 and 131,644.80 is: 197,388.71
Step by Step Solution
- Step 1: Write the proportion equation
214,691.20 : 321,908.80 = 131,644.80 : x - Step 2: Convert to fraction form
214,691.20/321,908.80 = 131,644.80/x - Step 3: Cross multiply
214,691.20x = 321,908.80 × 131,644.80 - Step 4: Simplify right side
214,691.20x = 42,377,619,594.24 - Step 5: Solve for x
x = 42,377,619,594.24/214,691.20 - Step 6: Final answer
x = 197,388.71
Related Problems
Find fourth proportional to 107,345.60, 160,954.40 and 65,822.40
Half scale
Find fourth proportional to 429,382.40, 643,817.60 and 263,289.60
Double scale
Find fourth proportional to 214,692.20, 321,910.30 and 131,645.80
Similar ratio
Find fourth proportional to 322,036.80, 482,863.20 and 197,467.20
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.