Finding the Fourth Proportional to 395.76, 546.14 and 221.09
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Solution
The fourth proportional to 395.76, 546.14 and 221.09 is: 305.10
Step by Step Solution
- Step 1: Write the proportion equation
395.76 : 546.14 = 221.09 : x - Step 2: Convert to fraction form
395.76/546.14 = 221.09/x - Step 3: Cross multiply
395.76x = 546.14 × 221.09 - Step 4: Simplify right side
395.76x = 120,744.99 - Step 5: Solve for x
x = 120,744.99/395.76 - Step 6: Final answer
x = 305.10
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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.