Finding the Fourth Proportional to 261.53, 391.84 and 193.19
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Solution
The fourth proportional to 261.53, 391.84 and 193.19 is: 289.44
Step by Step Solution
- Step 1: Write the proportion equation
261.53 : 391.84 = 193.19 : x - Step 2: Convert to fraction form
261.53/391.84 = 193.19/x - Step 3: Cross multiply
261.53x = 391.84 × 193.19 - Step 4: Simplify right side
261.53x = 75,697.13 - Step 5: Solve for x
x = 75,697.13/261.53 - Step 6: Final answer
x = 289.44
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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.