Finding the Fourth Proportional to 318.11, 438.99 and 178.22
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Solution
The fourth proportional to 318.11, 438.99 and 178.22 is: 245.94
Step by Step Solution
- Step 1: Write the proportion equation
318.11 : 438.99 = 178.22 : x - Step 2: Convert to fraction form
318.11/438.99 = 178.22/x - Step 3: Cross multiply
318.11x = 438.99 × 178.22 - Step 4: Simplify right side
318.11x = 78,234.60 - Step 5: Solve for x
x = 78,234.60/318.11 - Step 6: Final answer
x = 245.94
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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.