Finding the Fourth Proportional to 201.21, 301.77 and 79.43
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Solution
The fourth proportional to 201.21, 301.77 and 79.43 is: 119.12
Step by Step Solution
- Step 1: Write the proportion equation
201.21 : 301.77 = 79.43 : x - Step 2: Convert to fraction form
201.21/301.77 = 79.43/x - Step 3: Cross multiply
201.21x = 301.77 × 79.43 - Step 4: Simplify right side
201.21x = 23,968.08 - Step 5: Solve for x
x = 23,968.08/201.21 - Step 6: Final answer
x = 119.12
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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.