Finding the Fourth Proportional to 261.11, 391.53 and 106.99
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Solution
The fourth proportional to 261.11, 391.53 and 106.99 is: 160.43
Step by Step Solution
- Step 1: Write the proportion equation
261.11 : 391.53 = 106.99 : x - Step 2: Convert to fraction form
261.11/391.53 = 106.99/x - Step 3: Cross multiply
261.11x = 391.53 × 106.99 - Step 4: Simplify right side
261.11x = 41,889.26 - Step 5: Solve for x
x = 41,889.26/261.11 - Step 6: Final answer
x = 160.43
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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.