Finding the Fourth Proportional to 290.21, 435.19 and 84.77
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Solution
The fourth proportional to 290.21, 435.19 and 84.77 is: 127.12
Step by Step Solution
- Step 1: Write the proportion equation
290.21 : 435.19 = 84.77 : x - Step 2: Convert to fraction form
290.21/435.19 = 84.77/x - Step 3: Cross multiply
290.21x = 435.19 × 84.77 - Step 4: Simplify right side
290.21x = 36,891.06 - Step 5: Solve for x
x = 36,891.06/290.21 - Step 6: Final answer
x = 127.12
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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.