Finding the Third Proportional to 388 and 820
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Solution
The third proportional to 388 and 820 is: 1,732.99
Step by Step Solution
- Step 1: Write the proportion equation
388 : 820 = 820 : x - Step 2: Convert to fraction form
388/820 = 820/x - Step 3: Cross multiply
388x = 820 × 820 - Step 4: Simplify right side
388x = 672,400 - Step 5: Solve for x
x = 672,400/388 - Step 6: Final answer
x = 1,732.99
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These problems maintain the same ratio (2.11) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.