Finding the Third Proportional to 396 and 645.50
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Solution
The third proportional to 396 and 645.50 is: 1,052.20
Step by Step Solution
- Step 1: Write the proportion equation
396 : 645.50 = 645.50 : x - Step 2: Convert to fraction form
396/645.50 = 645.50/x - Step 3: Cross multiply
396x = 645.50 × 645.50 - Step 4: Simplify right side
396x = 416,670.25 - Step 5: Solve for x
x = 416,670.25/396 - Step 6: Final answer
x = 1,052.20
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These problems maintain the same ratio (1.63) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.