Finding the Third Proportional to 2,115 and 2,979
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Solution
The third proportional to 2,115 and 2,979 is: 4,195.95
Step by Step Solution
- Step 1: Write the proportion equation
2,115 : 2,979 = 2,979 : x - Step 2: Convert to fraction form
2,115/2,979 = 2,979/x - Step 3: Cross multiply
2,115x = 2,979 × 2,979 - Step 4: Simplify right side
2,115x = 8,874,441 - Step 5: Solve for x
x = 8,874,441/2,115 - Step 6: Final answer
x = 4,195.95
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Why These Related Problems?
These problems maintain the same ratio (1.41) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.