Finding the Third Proportional to 920 and 1,800
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Solution
The third proportional to 920 and 1,800 is: 3,521.74
Step by Step Solution
- Step 1: Write the proportion equation
920 : 1,800 = 1,800 : x - Step 2: Convert to fraction form
920/1,800 = 1,800/x - Step 3: Cross multiply
920x = 1,800 × 1,800 - Step 4: Simplify right side
920x = 3,240,000 - Step 5: Solve for x
x = 3,240,000/920 - Step 6: Final answer
x = 3,521.74
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Why These Related Problems?
These problems maintain the same ratio (1.96) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.