Finding the Third Proportional to 305 and 395
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Solution
The third proportional to 305 and 395 is: 511.56
Step by Step Solution
- Step 1: Write the proportion equation
305 : 395 = 395 : x - Step 2: Convert to fraction form
305/395 = 395/x - Step 3: Cross multiply
305x = 395 × 395 - Step 4: Simplify right side
305x = 156,025 - Step 5: Solve for x
x = 156,025/305 - Step 6: Final answer
x = 511.56
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Why These Related Problems?
These problems maintain the same ratio (1.30) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.