Finding the Fourth Proportional to 290.09, 434.75 and 135.99
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Solution
The fourth proportional to 290.09, 434.75 and 135.99 is: 203.81
Step by Step Solution
- Step 1: Write the proportion equation
290.09 : 434.75 = 135.99 : x - Step 2: Convert to fraction form
290.09/434.75 = 135.99/x - Step 3: Cross multiply
290.09x = 434.75 × 135.99 - Step 4: Simplify right side
290.09x = 59,120.97 - Step 5: Solve for x
x = 59,120.97/290.09 - Step 6: Final answer
x = 203.81
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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.