Finding the Fourth Proportional to 261.20, 391.08 and 132.68
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Solution
The fourth proportional to 261.20, 391.08 and 132.68 is: 198.65
Step by Step Solution
- Step 1: Write the proportion equation
261.20 : 391.08 = 132.68 : x - Step 2: Convert to fraction form
261.20/391.08 = 132.68/x - Step 3: Cross multiply
261.20x = 391.08 × 132.68 - Step 4: Simplify right side
261.20x = 51,888.49 - Step 5: Solve for x
x = 51,888.49/261.20 - Step 6: Final answer
x = 198.65
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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.