Finding the Fourth Proportional to 381.62, 572.29 and 198.99
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Solution
The fourth proportional to 381.62, 572.29 and 198.99 is: 298.41
Step by Step Solution
- Step 1: Write the proportion equation
381.62 : 572.29 = 198.99 : x - Step 2: Convert to fraction form
381.62/572.29 = 198.99/x - Step 3: Cross multiply
381.62x = 572.29 × 198.99 - Step 4: Simplify right side
381.62x = 113,879.99 - Step 5: Solve for x
x = 113,879.99/381.62 - Step 6: Final answer
x = 298.41
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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.