Finding the Fourth Proportional to 231.21, 346.85 and 84.99
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Solution
The fourth proportional to 231.21, 346.85 and 84.99 is: 127.50
Step by Step Solution
- Step 1: Write the proportion equation
231.21 : 346.85 = 84.99 : x - Step 2: Convert to fraction form
231.21/346.85 = 84.99/x - Step 3: Cross multiply
231.21x = 346.85 × 84.99 - Step 4: Simplify right side
231.21x = 29,478.36 - Step 5: Solve for x
x = 29,478.36/231.21 - Step 6: Final answer
x = 127.50
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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.