Finding the Fourth Proportional to 231.99, 320.11 and 149.11
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Solution
The fourth proportional to 231.99, 320.11 and 149.11 is: 205.75
Step by Step Solution
- Step 1: Write the proportion equation
231.99 : 320.11 = 149.11 : x - Step 2: Convert to fraction form
231.99/320.11 = 149.11/x - Step 3: Cross multiply
231.99x = 320.11 × 149.11 - Step 4: Simplify right side
231.99x = 47,730.99 - Step 5: Solve for x
x = 47,730.99/231.99 - Step 6: Final answer
x = 205.75
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Why These Related Problems?
These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.