Finding the Fourth Proportional to 318.20, 438.96 and 201.80
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Solution
The fourth proportional to 318.20, 438.96 and 201.80 is: 278.39
Step by Step Solution
- Step 1: Write the proportion equation
318.20 : 438.96 = 201.80 : x - Step 2: Convert to fraction form
318.20/438.96 = 201.80/x - Step 3: Cross multiply
318.20x = 438.96 × 201.80 - Step 4: Simplify right side
318.20x = 88,582.13 - Step 5: Solve for x
x = 88,582.13/318.20 - Step 6: Final answer
x = 278.39
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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.