Finding the Fourth Proportional to 290.22, 435.21 and 84.75
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Solution
The fourth proportional to 290.22, 435.21 and 84.75 is: 127.08
Step by Step Solution
- Step 1: Write the proportion equation
290.22 : 435.21 = 84.75 : x - Step 2: Convert to fraction form
290.22/435.21 = 84.75/x - Step 3: Cross multiply
290.22x = 435.21 × 84.75 - Step 4: Simplify right side
290.22x = 36,882.81 - Step 5: Solve for x
x = 36,882.81/290.22 - Step 6: Final answer
x = 127.08
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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.