Finding the Fourth Proportional to 274.26, 378.21 and 218.85
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Solution
The fourth proportional to 274.26, 378.21 and 218.85 is: 301.80
Step by Step Solution
- Step 1: Write the proportion equation
274.26 : 378.21 = 218.85 : x - Step 2: Convert to fraction form
274.26/378.21 = 218.85/x - Step 3: Cross multiply
274.26x = 378.21 × 218.85 - Step 4: Simplify right side
274.26x = 82,771.26 - Step 5: Solve for x
x = 82,771.26/274.26 - Step 6: Final answer
x = 301.80
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Why These Related Problems?
These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.