Finding the Fourth Proportional to 396.44, 547.10 and 221.79
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Solution
The fourth proportional to 396.44, 547.10 and 221.79 is: 306.08
Step by Step Solution
- Step 1: Write the proportion equation
396.44 : 547.10 = 221.79 : x - Step 2: Convert to fraction form
396.44/547.10 = 221.79/x - Step 3: Cross multiply
396.44x = 547.10 × 221.79 - Step 4: Simplify right side
396.44x = 121,341.31 - Step 5: Solve for x
x = 121,341.31/396.44 - Step 6: Final answer
x = 306.08
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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.