Finding the Fourth Proportional to 198.61, 274.20 and 124.99
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Solution
The fourth proportional to 198.61, 274.20 and 124.99 is: 172.56
Step by Step Solution
- Step 1: Write the proportion equation
198.61 : 274.20 = 124.99 : x - Step 2: Convert to fraction form
198.61/274.20 = 124.99/x - Step 3: Cross multiply
198.61x = 274.20 × 124.99 - Step 4: Simplify right side
198.61x = 34,272.26 - Step 5: Solve for x
x = 34,272.26/198.61 - Step 6: Final answer
x = 172.56
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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.