Finding the Fourth Proportional to 281.26, 421.77 and 207.69
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Solution
The fourth proportional to 281.26, 421.77 and 207.69 is: 311.45
Step by Step Solution
- Step 1: Write the proportion equation
281.26 : 421.77 = 207.69 : x - Step 2: Convert to fraction form
281.26/421.77 = 207.69/x - Step 3: Cross multiply
281.26x = 421.77 × 207.69 - Step 4: Simplify right side
281.26x = 87,597.41 - Step 5: Solve for x
x = 87,597.41/281.26 - Step 6: Final answer
x = 311.45
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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.