Finding the Fourth Proportional to 252.70, 378.97 and 143.15
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Solution
The fourth proportional to 252.70, 378.97 and 143.15 is: 214.67
Step by Step Solution
- Step 1: Write the proportion equation
252.70 : 378.97 = 143.15 : x - Step 2: Convert to fraction form
252.70/378.97 = 143.15/x - Step 3: Cross multiply
252.70x = 378.97 × 143.15 - Step 4: Simplify right side
252.70x = 54,247.30 - Step 5: Solve for x
x = 54,247.30/252.70 - Step 6: Final answer
x = 214.67
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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.