Finding the Fourth Proportional to 220.70, 331.26 and 99
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Solution
The fourth proportional to 220.70, 331.26 and 99 is: 148.59
Step by Step Solution
- Step 1: Write the proportion equation
220.70 : 331.26 = 99 : x - Step 2: Convert to fraction form
220.70/331.26 = 99/x - Step 3: Cross multiply
220.70x = 331.26 × 99 - Step 4: Simplify right side
220.70x = 32,794.74 - Step 5: Solve for x
x = 32,794.74/220.70 - Step 6: Final answer
x = 148.59
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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.