Finding the Fourth Proportional to 206.87, 310.07 and 84.99
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Solution
The fourth proportional to 206.87, 310.07 and 84.99 is: 127.39
Step by Step Solution
- Step 1: Write the proportion equation
206.87 : 310.07 = 84.99 : x - Step 2: Convert to fraction form
206.87/310.07 = 84.99/x - Step 3: Cross multiply
206.87x = 310.07 × 84.99 - Step 4: Simplify right side
206.87x = 26,352.85 - Step 5: Solve for x
x = 26,352.85/206.87 - Step 6: Final answer
x = 127.39
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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.