Finding the Fourth Proportional to 207.92, 311.87 and 126.60
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Solution
The fourth proportional to 207.92, 311.87 and 126.60 is: 189.90
Step by Step Solution
- Step 1: Write the proportion equation
207.92 : 311.87 = 126.60 : x - Step 2: Convert to fraction form
207.92/311.87 = 126.60/x - Step 3: Cross multiply
207.92x = 311.87 × 126.60 - Step 4: Simplify right side
207.92x = 39,483.06 - Step 5: Solve for x
x = 39,483.06/207.92 - Step 6: Final answer
x = 189.90
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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.