Finding the Fourth Proportional to 201.58, 302.21 and 87.66
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Solution
The fourth proportional to 201.58, 302.21 and 87.66 is: 131.42
Step by Step Solution
- Step 1: Write the proportion equation
201.58 : 302.21 = 87.66 : x - Step 2: Convert to fraction form
201.58/302.21 = 87.66/x - Step 3: Cross multiply
201.58x = 302.21 × 87.66 - Step 4: Simplify right side
201.58x = 26,491.73 - Step 5: Solve for x
x = 26,491.73/201.58 - Step 6: Final answer
x = 131.42
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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.