Finding the Fourth Proportional to 198.99, 298.49 and 68.99
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Solution
The fourth proportional to 198.99, 298.49 and 68.99 is: 103.48
Step by Step Solution
- Step 1: Write the proportion equation
198.99 : 298.49 = 68.99 : x - Step 2: Convert to fraction form
198.99/298.49 = 68.99/x - Step 3: Cross multiply
198.99x = 298.49 × 68.99 - Step 4: Simplify right side
198.99x = 20,590.99 - Step 5: Solve for x
x = 20,590.99/198.99 - Step 6: Final answer
x = 103.48
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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.