Finding the Fourth Proportional to 198.88, 274.48 and 121.26
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Solution
The fourth proportional to 198.88, 274.48 and 121.26 is: 167.35
Step by Step Solution
- Step 1: Write the proportion equation
198.88 : 274.48 = 121.26 : x - Step 2: Convert to fraction form
198.88/274.48 = 121.26/x - Step 3: Cross multiply
198.88x = 274.48 × 121.26 - Step 4: Simplify right side
198.88x = 33,283.44 - Step 5: Solve for x
x = 33,283.44/198.88 - Step 6: Final answer
x = 167.35
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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.