Finding the Fourth Proportional to 396.36, 547.01 and 221.70
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Solution
The fourth proportional to 396.36, 547.01 and 221.70 is: 305.96
Step by Step Solution
- Step 1: Write the proportion equation
396.36 : 547.01 = 221.70 : x - Step 2: Convert to fraction form
396.36/547.01 = 221.70/x - Step 3: Cross multiply
396.36x = 547.01 × 221.70 - Step 4: Simplify right side
396.36x = 121,272.12 - Step 5: Solve for x
x = 121,272.12/396.36 - Step 6: Final answer
x = 305.96
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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.