Finding the Fourth Proportional to 221.15, 331.19 and 155.99
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Solution
The fourth proportional to 221.15, 331.19 and 155.99 is: 233.60
Step by Step Solution
- Step 1: Write the proportion equation
221.15 : 331.19 = 155.99 : x - Step 2: Convert to fraction form
221.15/331.19 = 155.99/x - Step 3: Cross multiply
221.15x = 331.19 × 155.99 - Step 4: Simplify right side
221.15x = 51,661.55 - Step 5: Solve for x
x = 51,661.55/221.15 - Step 6: Final answer
x = 233.60
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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.