Finding the Fourth Proportional to 317.76, 438.99 and 271.63
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Solution
The fourth proportional to 317.76, 438.99 and 271.63 is: 375.26
Step by Step Solution
- Step 1: Write the proportion equation
317.76 : 438.99 = 271.63 : x - Step 2: Convert to fraction form
317.76/438.99 = 271.63/x - Step 3: Cross multiply
317.76x = 438.99 × 271.63 - Step 4: Simplify right side
317.76x = 119,242.85 - Step 5: Solve for x
x = 119,242.85/317.76 - Step 6: Final answer
x = 375.26
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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.