Finding the Fourth Proportional to 321.91, 443.80 and 251.69
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Solution
The fourth proportional to 321.91, 443.80 and 251.69 is: 346.99
Step by Step Solution
- Step 1: Write the proportion equation
321.91 : 443.80 = 251.69 : x - Step 2: Convert to fraction form
321.91/443.80 = 251.69/x - Step 3: Cross multiply
321.91x = 443.80 × 251.69 - Step 4: Simplify right side
321.91x = 111,700.02 - Step 5: Solve for x
x = 111,700.02/321.91 - Step 6: Final answer
x = 346.99
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Why These Related Problems?
These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.