Finding the Fourth Proportional to 201.75, 302.40 and 91.95
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Solution
The fourth proportional to 201.75, 302.40 and 91.95 is: 137.82
Step by Step Solution
- Step 1: Write the proportion equation
201.75 : 302.40 = 91.95 : x - Step 2: Convert to fraction form
201.75/302.40 = 91.95/x - Step 3: Cross multiply
201.75x = 302.40 × 91.95 - Step 4: Simplify right side
201.75x = 27,805.68 - Step 5: Solve for x
x = 27,805.68/201.75 - Step 6: Final answer
x = 137.82
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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.