Finding the Fourth Proportional to 199.21, 298.62 and 130.67
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Solution
The fourth proportional to 199.21, 298.62 and 130.67 is: 195.88
Step by Step Solution
- Step 1: Write the proportion equation
199.21 : 298.62 = 130.67 : x - Step 2: Convert to fraction form
199.21/298.62 = 130.67/x - Step 3: Cross multiply
199.21x = 298.62 × 130.67 - Step 4: Simplify right side
199.21x = 39,020.68 - Step 5: Solve for x
x = 39,020.68/199.21 - Step 6: Final answer
x = 195.88
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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.