Finding the Fourth Proportional to 207.91, 311.67 and 79.75
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Solution
The fourth proportional to 207.91, 311.67 and 79.75 is: 119.55
Step by Step Solution
- Step 1: Write the proportion equation
207.91 : 311.67 = 79.75 : x - Step 2: Convert to fraction form
207.91/311.67 = 79.75/x - Step 3: Cross multiply
207.91x = 311.67 × 79.75 - Step 4: Simplify right side
207.91x = 24,855.68 - Step 5: Solve for x
x = 24,855.68/207.91 - Step 6: Final answer
x = 119.55
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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.