Finding the Fourth Proportional to 207.70, 311.85 and 126.88
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Solution
The fourth proportional to 207.70, 311.85 and 126.88 is: 190.50
Step by Step Solution
- Step 1: Write the proportion equation
207.70 : 311.85 = 126.88 : x - Step 2: Convert to fraction form
207.70/311.85 = 126.88/x - Step 3: Cross multiply
207.70x = 311.85 × 126.88 - Step 4: Simplify right side
207.70x = 39,567.53 - Step 5: Solve for x
x = 39,567.53/207.70 - Step 6: Final answer
x = 190.50
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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.