Finding the Fourth Proportional to 221.06, 305.08 and 143.44
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Solution
The fourth proportional to 221.06, 305.08 and 143.44 is: 197.95
Step by Step Solution
- Step 1: Write the proportion equation
221.06 : 305.08 = 143.44 : x - Step 2: Convert to fraction form
221.06/305.08 = 143.44/x - Step 3: Cross multiply
221.06x = 305.08 × 143.44 - Step 4: Simplify right side
221.06x = 43,759.55 - Step 5: Solve for x
x = 43,759.55/221.06 - Step 6: Final answer
x = 197.95
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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.