Finding the Fourth Proportional to 199.97, 299.60 and 138.99
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Solution
The fourth proportional to 199.97, 299.60 and 138.99 is: 208.23
Step by Step Solution
- Step 1: Write the proportion equation
199.97 : 299.60 = 138.99 : x - Step 2: Convert to fraction form
199.97/299.60 = 138.99/x - Step 3: Cross multiply
199.97x = 299.60 × 138.99 - Step 4: Simplify right side
199.97x = 41,640.89 - Step 5: Solve for x
x = 41,640.89/199.97 - Step 6: Final answer
x = 208.23
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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.