Finding the Fourth Proportional to 395.73, 546.08 and 221.09
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Solution
The fourth proportional to 395.73, 546.08 and 221.09 is: 305.08
Step by Step Solution
- Step 1: Write the proportion equation
395.73 : 546.08 = 221.09 : x - Step 2: Convert to fraction form
395.73/546.08 = 221.09/x - Step 3: Cross multiply
395.73x = 546.08 × 221.09 - Step 4: Simplify right side
395.73x = 120,728.99 - Step 5: Solve for x
x = 120,728.99/395.73 - Step 6: Final answer
x = 305.08
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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.