Finding the Fourth Proportional to 252.70, 378.91 and 130.66
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Solution
The fourth proportional to 252.70, 378.91 and 130.66 is: 195.92
Step by Step Solution
- Step 1: Write the proportion equation
252.70 : 378.91 = 130.66 : x - Step 2: Convert to fraction form
252.70/378.91 = 130.66/x - Step 3: Cross multiply
252.70x = 378.91 × 130.66 - Step 4: Simplify right side
252.70x = 49,508.38 - Step 5: Solve for x
x = 49,508.38/252.70 - Step 6: Final answer
x = 195.92
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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.