Finding the Fourth Proportional to 252.76, 378.81 and 115.78
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Solution
The fourth proportional to 252.76, 378.81 and 115.78 is: 173.52
Step by Step Solution
- Step 1: Write the proportion equation
252.76 : 378.81 = 115.78 : x - Step 2: Convert to fraction form
252.76/378.81 = 115.78/x - Step 3: Cross multiply
252.76x = 378.81 × 115.78 - Step 4: Simplify right side
252.76x = 43,858.62 - Step 5: Solve for x
x = 43,858.62/252.76 - Step 6: Final answer
x = 173.52
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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.