Finding the Fourth Proportional to 290.26, 400.26 and 173.80
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Solution
The fourth proportional to 290.26, 400.26 and 173.80 is: 239.67
Step by Step Solution
- Step 1: Write the proportion equation
290.26 : 400.26 = 173.80 : x - Step 2: Convert to fraction form
290.26/400.26 = 173.80/x - Step 3: Cross multiply
290.26x = 400.26 × 173.80 - Step 4: Simplify right side
290.26x = 69,565.19 - Step 5: Solve for x
x = 69,565.19/290.26 - Step 6: Final answer
x = 239.67
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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.