Finding the Fourth Proportional to 221.24, 331.91 and 74.99
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Solution
The fourth proportional to 221.24, 331.91 and 74.99 is: 112.51
Step by Step Solution
- Step 1: Write the proportion equation
221.24 : 331.91 = 74.99 : x - Step 2: Convert to fraction form
221.24/331.91 = 74.99/x - Step 3: Cross multiply
221.24x = 331.91 × 74.99 - Step 4: Simplify right side
221.24x = 24,890.39 - Step 5: Solve for x
x = 24,890.39/221.24 - Step 6: Final answer
x = 112.51
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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.