Finding the Fourth Proportional to 317.62, 438.11 and 217.99
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Solution
The fourth proportional to 317.62, 438.11 and 217.99 is: 300.68
Step by Step Solution
- Step 1: Write the proportion equation
317.62 : 438.11 = 217.99 : x - Step 2: Convert to fraction form
317.62/438.11 = 217.99/x - Step 3: Cross multiply
317.62x = 438.11 × 217.99 - Step 4: Simplify right side
317.62x = 95,501.41 - Step 5: Solve for x
x = 95,501.41/317.62 - Step 6: Final answer
x = 300.68
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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.