Finding the Fourth Proportional to 201.24, 301.68 and 85.60
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Solution
The fourth proportional to 201.24, 301.68 and 85.60 is: 128.32
Step by Step Solution
- Step 1: Write the proportion equation
201.24 : 301.68 = 85.60 : x - Step 2: Convert to fraction form
201.24/301.68 = 85.60/x - Step 3: Cross multiply
201.24x = 301.68 × 85.60 - Step 4: Simplify right side
201.24x = 25,823.81 - Step 5: Solve for x
x = 25,823.81/201.24 - Step 6: Final answer
x = 128.32
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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.