Finding the Third Proportional to 261 and 489
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Solution
The third proportional to 261 and 489 is: 916.17
Step by Step Solution
- Step 1: Write the proportion equation
261 : 489 = 489 : x - Step 2: Convert to fraction form
261/489 = 489/x - Step 3: Cross multiply
261x = 489 × 489 - Step 4: Simplify right side
261x = 239,121 - Step 5: Solve for x
x = 239,121/261 - Step 6: Final answer
x = 916.17
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Why These Related Problems?
These problems maintain the same ratio (1.87) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.