Finding the Third Proportional to 221 and 489.50
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Solution
The third proportional to 221 and 489.50 is: 1,084.21
Step by Step Solution
- Step 1: Write the proportion equation
221 : 489.50 = 489.50 : x - Step 2: Convert to fraction form
221/489.50 = 489.50/x - Step 3: Cross multiply
221x = 489.50 × 489.50 - Step 4: Simplify right side
221x = 239,610.25 - Step 5: Solve for x
x = 239,610.25/221 - Step 6: Final answer
x = 1,084.21
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Why These Related Problems?
These problems maintain the same ratio (2.21) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.