Finding the Fourth Proportional to 252.53, 378.79 and 130.80
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Solution
The fourth proportional to 252.53, 378.79 and 130.80 is: 196.20
Step by Step Solution
- Step 1: Write the proportion equation
252.53 : 378.79 = 130.80 : x - Step 2: Convert to fraction form
252.53/378.79 = 130.80/x - Step 3: Cross multiply
252.53x = 378.79 × 130.80 - Step 4: Simplify right side
252.53x = 49,545.73 - Step 5: Solve for x
x = 49,545.73/252.53 - Step 6: Final answer
x = 196.20
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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.