Finding the Third Proportional to 391 and 675
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Solution
The third proportional to 391 and 675 is: 1,165.28
Step by Step Solution
- Step 1: Write the proportion equation
391 : 675 = 675 : x - Step 2: Convert to fraction form
391/675 = 675/x - Step 3: Cross multiply
391x = 675 × 675 - Step 4: Simplify right side
391x = 455,625 - Step 5: Solve for x
x = 455,625/391 - Step 6: Final answer
x = 1,165.28
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Why These Related Problems?
These problems maintain the same ratio (1.73) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.