Finding the Fourth Proportional to 201.28, 277.92 and 157.60
Calculator
Solution
The fourth proportional to 201.28, 277.92 and 157.60 is: 217.61
Step by Step Solution
- Step 1: Write the proportion equation
201.28 : 277.92 = 157.60 : x - Step 2: Convert to fraction form
201.28/277.92 = 157.60/x - Step 3: Cross multiply
201.28x = 277.92 × 157.60 - Step 4: Simplify right side
201.28x = 43,800.19 - Step 5: Solve for x
x = 43,800.19/201.28 - Step 6: Final answer
x = 217.61
Related Problems
Find fourth proportional to 100.64, 138.96 and 78.80
Half scale
Find fourth proportional to 402.56, 555.84 and 315.20
Double scale
Find fourth proportional to 202.28, 279.30 and 158.60
Similar ratio
Find fourth proportional to 301.92, 416.88 and 236.40
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.