Finding the Fourth Proportional to 290.82, 436.13 and 85.33
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Solution
The fourth proportional to 290.82, 436.13 and 85.33 is: 127.97
Step by Step Solution
- Step 1: Write the proportion equation
290.82 : 436.13 = 85.33 : x - Step 2: Convert to fraction form
290.82/436.13 = 85.33/x - Step 3: Cross multiply
290.82x = 436.13 × 85.33 - Step 4: Simplify right side
290.82x = 37,214.97 - Step 5: Solve for x
x = 37,214.97/290.82 - Step 6: Final answer
x = 127.97
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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.