Finding the Fourth Proportional to 285.44, 428.05 and 79.94
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Solution
The fourth proportional to 285.44, 428.05 and 79.94 is: 119.88
Step by Step Solution
- Step 1: Write the proportion equation
285.44 : 428.05 = 79.94 : x - Step 2: Convert to fraction form
285.44/428.05 = 79.94/x - Step 3: Cross multiply
285.44x = 428.05 × 79.94 - Step 4: Simplify right side
285.44x = 34,219.19 - Step 5: Solve for x
x = 34,219.19/285.44 - Step 6: Final answer
x = 119.88
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Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.