Finding the Third Proportional to 220 and 392
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Solution
The third proportional to 220 and 392 is: 698.47
Step by Step Solution
- Step 1: Write the proportion equation
220 : 392 = 392 : x - Step 2: Convert to fraction form
220/392 = 392/x - Step 3: Cross multiply
220x = 392 × 392 - Step 4: Simplify right side
220x = 153,664 - Step 5: Solve for x
x = 153,664/220 - Step 6: Final answer
x = 698.47
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These problems maintain the same ratio (1.78) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.