Finding the Third Proportional to 380 and 489.50
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Solution
The third proportional to 380 and 489.50 is: 630.55
Step by Step Solution
- Step 1: Write the proportion equation
380 : 489.50 = 489.50 : x - Step 2: Convert to fraction form
380/489.50 = 489.50/x - Step 3: Cross multiply
380x = 489.50 × 489.50 - Step 4: Simplify right side
380x = 239,610.25 - Step 5: Solve for x
x = 239,610.25/380 - Step 6: Final answer
x = 630.55
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These problems maintain the same ratio (1.29) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.