Finding the Fourth Proportional to 221.60, 305.36 and 163.28
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Solution
The fourth proportional to 221.60, 305.36 and 163.28 is: 225.00
Step by Step Solution
- Step 1: Write the proportion equation
221.60 : 305.36 = 163.28 : x - Step 2: Convert to fraction form
221.60/305.36 = 163.28/x - Step 3: Cross multiply
221.60x = 305.36 × 163.28 - Step 4: Simplify right side
221.60x = 49,859.18 - Step 5: Solve for x
x = 49,859.18/221.60 - Step 6: Final answer
x = 225.00
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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.