Finding the Fourth Proportional to 213.28, 319.76 and 104.99
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Solution
The fourth proportional to 213.28, 319.76 and 104.99 is: 157.41
Step by Step Solution
- Step 1: Write the proportion equation
213.28 : 319.76 = 104.99 : x - Step 2: Convert to fraction form
213.28/319.76 = 104.99/x - Step 3: Cross multiply
213.28x = 319.76 × 104.99 - Step 4: Simplify right side
213.28x = 33,571.08 - Step 5: Solve for x
x = 33,571.08/213.28 - Step 6: Final answer
x = 157.41
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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.