Finding the Fourth Proportional to 252.78, 378.87 and 115.70
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Solution
The fourth proportional to 252.78, 378.87 and 115.70 is: 173.41
Step by Step Solution
- Step 1: Write the proportion equation
252.78 : 378.87 = 115.70 : x - Step 2: Convert to fraction form
252.78/378.87 = 115.70/x - Step 3: Cross multiply
252.78x = 378.87 × 115.70 - Step 4: Simplify right side
252.78x = 43,833.36 - Step 5: Solve for x
x = 43,833.36/252.78 - Step 6: Final answer
x = 173.41
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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.