Finding the Fourth Proportional to 206.11, 309.10 and 69.12
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Solution
The fourth proportional to 206.11, 309.10 and 69.12 is: 103.66
Step by Step Solution
- Step 1: Write the proportion equation
206.11 : 309.10 = 69.12 : x - Step 2: Convert to fraction form
206.11/309.10 = 69.12/x - Step 3: Cross multiply
206.11x = 309.10 × 69.12 - Step 4: Simplify right side
206.11x = 21,364.99 - Step 5: Solve for x
x = 21,364.99/206.11 - Step 6: Final answer
x = 103.66
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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.