Finding the Fourth Proportional to 221.26, 331.88 and 69.26
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Solution
The fourth proportional to 221.26, 331.88 and 69.26 is: 103.89
Step by Step Solution
- Step 1: Write the proportion equation
221.26 : 331.88 = 69.26 : x - Step 2: Convert to fraction form
221.26/331.88 = 69.26/x - Step 3: Cross multiply
221.26x = 331.88 × 69.26 - Step 4: Simplify right side
221.26x = 22,986.01 - Step 5: Solve for x
x = 22,986.01/221.26 - Step 6: Final answer
x = 103.89
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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.