Finding the Third Proportional to 281 and 690
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Solution
The third proportional to 281 and 690 is: 1,694.31
Step by Step Solution
- Step 1: Write the proportion equation
281 : 690 = 690 : x - Step 2: Convert to fraction form
281/690 = 690/x - Step 3: Cross multiply
281x = 690 × 690 - Step 4: Simplify right side
281x = 476,100 - Step 5: Solve for x
x = 476,100/281 - Step 6: Final answer
x = 1,694.31
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Why These Related Problems?
These problems maintain the same ratio (2.46) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.