Finding the Fourth Proportional to 206.21, 309.30 and 84.44
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Solution
The fourth proportional to 206.21, 309.30 and 84.44 is: 126.65
Step by Step Solution
- Step 1: Write the proportion equation
206.21 : 309.30 = 84.44 : x - Step 2: Convert to fraction form
206.21/309.30 = 84.44/x - Step 3: Cross multiply
206.21x = 309.30 × 84.44 - Step 4: Simplify right side
206.21x = 26,115.75 - Step 5: Solve for x
x = 26,115.75/206.21 - Step 6: Final answer
x = 126.65
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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.