Finding the Fourth Proportional to 396.60, 547.30 and 221.99
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Solution
The fourth proportional to 396.60, 547.30 and 221.99 is: 306.33
Step by Step Solution
- Step 1: Write the proportion equation
396.60 : 547.30 = 221.99 : x - Step 2: Convert to fraction form
396.60/547.30 = 221.99/x - Step 3: Cross multiply
396.60x = 547.30 × 221.99 - Step 4: Simplify right side
396.60x = 121,491.28 - Step 5: Solve for x
x = 121,491.28/396.60 - Step 6: Final answer
x = 306.33
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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.