Finding the Third Proportional to 331.50 and 387
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Solution
The third proportional to 331.50 and 387 is: 451.79
Step by Step Solution
- Step 1: Write the proportion equation
331.50 : 387 = 387 : x - Step 2: Convert to fraction form
331.50/387 = 387/x - Step 3: Cross multiply
331.50x = 387 × 387 - Step 4: Simplify right side
331.50x = 149,769 - Step 5: Solve for x
x = 149,769/331.50 - Step 6: Final answer
x = 451.79
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Why These Related Problems?
These problems maintain the same ratio (1.17) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.