Finding the Fourth Proportional to 206.11, 309.21 and 84.48
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Solution
The fourth proportional to 206.11, 309.21 and 84.48 is: 126.74
Step by Step Solution
- Step 1: Write the proportion equation
206.11 : 309.21 = 84.48 : x - Step 2: Convert to fraction form
206.11/309.21 = 84.48/x - Step 3: Cross multiply
206.11x = 309.21 × 84.48 - Step 4: Simplify right side
206.11x = 26,122.06 - Step 5: Solve for x
x = 26,122.06/206.11 - Step 6: Final answer
x = 126.74
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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.