Finding the Fourth Proportional to 213.92, 320.99 and 92.22
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Solution
The fourth proportional to 213.92, 320.99 and 92.22 is: 138.37
Step by Step Solution
- Step 1: Write the proportion equation
213.92 : 320.99 = 92.22 : x - Step 2: Convert to fraction form
213.92/320.99 = 92.22/x - Step 3: Cross multiply
213.92x = 320.99 × 92.22 - Step 4: Simplify right side
213.92x = 29,601.24 - Step 5: Solve for x
x = 29,601.24/213.92 - Step 6: Final answer
x = 138.37
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Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.