Finding the Fourth Proportional to 201.21, 277.68 and 113.91
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Solution
The fourth proportional to 201.21, 277.68 and 113.91 is: 157.20
Step by Step Solution
- Step 1: Write the proportion equation
201.21 : 277.68 = 113.91 : x - Step 2: Convert to fraction form
201.21/277.68 = 113.91/x - Step 3: Cross multiply
201.21x = 277.68 × 113.91 - Step 4: Simplify right side
201.21x = 31,630.53 - Step 5: Solve for x
x = 31,630.53/201.21 - Step 6: Final answer
x = 157.20
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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.