Finding the Fourth Proportional to 216.38, 324.27 and 99.09
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Solution
The fourth proportional to 216.38, 324.27 and 99.09 is: 148.50
Step by Step Solution
- Step 1: Write the proportion equation
216.38 : 324.27 = 99.09 : x - Step 2: Convert to fraction form
216.38/324.27 = 99.09/x - Step 3: Cross multiply
216.38x = 324.27 × 99.09 - Step 4: Simplify right side
216.38x = 32,131.91 - Step 5: Solve for x
x = 32,131.91/216.38 - Step 6: Final answer
x = 148.50
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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.