Finding the Third Proportional to 312 and 393
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Solution
The third proportional to 312 and 393 is: 495.03
Step by Step Solution
- Step 1: Write the proportion equation
312 : 393 = 393 : x - Step 2: Convert to fraction form
312/393 = 393/x - Step 3: Cross multiply
312x = 393 × 393 - Step 4: Simplify right side
312x = 154,449 - Step 5: Solve for x
x = 154,449/312 - Step 6: Final answer
x = 495.03
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These problems maintain the same ratio (1.26) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.