Finding the Fourth Proportional to 38.05, 57 and 30.79
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Solution
The fourth proportional to 38.05, 57 and 30.79 is: 46.12
Step by Step Solution
- Step 1: Write the proportion equation
38.05 : 57 = 30.79 : x - Step 2: Convert to fraction form
38.05/57 = 30.79/x - Step 3: Cross multiply
38.05x = 57 × 30.79 - Step 4: Simplify right side
38.05x = 1,755.03 - Step 5: Solve for x
x = 1,755.03/38.05 - Step 6: Final answer
x = 46.12
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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.