Finding the Fourth Proportional to 213.13, 319.69 and 61.13
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Solution
The fourth proportional to 213.13, 319.69 and 61.13 is: 91.69
Step by Step Solution
- Step 1: Write the proportion equation
213.13 : 319.69 = 61.13 : x - Step 2: Convert to fraction form
213.13/319.69 = 61.13/x - Step 3: Cross multiply
213.13x = 319.69 × 61.13 - Step 4: Simplify right side
213.13x = 19,542.65 - Step 5: Solve for x
x = 19,542.65/213.13 - Step 6: Final answer
x = 91.69
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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.