Finding the Fourth Proportional to 3.99, 5.99 and 1.99
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Solution
The fourth proportional to 3.99, 5.99 and 1.99 is: 2.98
Step by Step Solution
- Step 1: Write the proportion equation
3.99 : 5.99 = 1.99 : x - Step 2: Convert to fraction form
3.99/5.99 = 1.99/x - Step 3: Cross multiply
3.99x = 5.99 × 1.99 - Step 4: Simplify right side
3.99x = 11.90 - Step 5: Solve for x
x = 11.90/3.99 - Step 6: Final answer
x = 2.98
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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.