Finding the Fourth Proportional to 207.97, 311.94 and 126.64
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Solution
The fourth proportional to 207.97, 311.94 and 126.64 is: 189.95
Step by Step Solution
- Step 1: Write the proportion equation
207.97 : 311.94 = 126.64 : x - Step 2: Convert to fraction form
207.97/311.94 = 126.64/x - Step 3: Cross multiply
207.97x = 311.94 × 126.64 - Step 4: Simplify right side
207.97x = 39,504.08 - Step 5: Solve for x
x = 39,504.08/207.97 - Step 6: Final answer
x = 189.95
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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.