Finding the Third Proportional to 679 and 871
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Solution
The third proportional to 679 and 871 is: 1,117.29
Step by Step Solution
- Step 1: Write the proportion equation
679 : 871 = 871 : x - Step 2: Convert to fraction form
679/871 = 871/x - Step 3: Cross multiply
679x = 871 × 871 - Step 4: Simplify right side
679x = 758,641 - Step 5: Solve for x
x = 758,641/679 - Step 6: Final answer
x = 1,117.29
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Why These Related Problems?
These problems maintain the same ratio (1.28) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.