Finding the Fourth Proportional to 318.26, 438.99 and 201.98
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Solution
The fourth proportional to 318.26, 438.99 and 201.98 is: 278.60
Step by Step Solution
- Step 1: Write the proportion equation
318.26 : 438.99 = 201.98 : x - Step 2: Convert to fraction form
318.26/438.99 = 201.98/x - Step 3: Cross multiply
318.26x = 438.99 × 201.98 - Step 4: Simplify right side
318.26x = 88,667.20 - Step 5: Solve for x
x = 88,667.20/318.26 - Step 6: Final answer
x = 278.60
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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.