Finding the Fourth Proportional to 396.24, 546.84 and 221.64
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Solution
The fourth proportional to 396.24, 546.84 and 221.64 is: 305.88
Step by Step Solution
- Step 1: Write the proportion equation
396.24 : 546.84 = 221.64 : x - Step 2: Convert to fraction form
396.24/546.84 = 221.64/x - Step 3: Cross multiply
396.24x = 546.84 × 221.64 - Step 4: Simplify right side
396.24x = 121,201.62 - Step 5: Solve for x
x = 121,201.62/396.24 - Step 6: Final answer
x = 305.88
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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.