Finding the Fourth Proportional to 252.28, 378.44 and 87.70
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Solution
The fourth proportional to 252.28, 378.44 and 87.70 is: 131.56
Step by Step Solution
- Step 1: Write the proportion equation
252.28 : 378.44 = 87.70 : x - Step 2: Convert to fraction form
252.28/378.44 = 87.70/x - Step 3: Cross multiply
252.28x = 378.44 × 87.70 - Step 4: Simplify right side
252.28x = 33,189.19 - Step 5: Solve for x
x = 33,189.19/252.28 - Step 6: Final answer
x = 131.56
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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.