Finding the Fourth Proportional to 201.84, 278.44 and 128.08
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Solution
The fourth proportional to 201.84, 278.44 and 128.08 is: 176.69
Step by Step Solution
- Step 1: Write the proportion equation
201.84 : 278.44 = 128.08 : x - Step 2: Convert to fraction form
201.84/278.44 = 128.08/x - Step 3: Cross multiply
201.84x = 278.44 × 128.08 - Step 4: Simplify right side
201.84x = 35,662.62 - Step 5: Solve for x
x = 35,662.62/201.84 - Step 6: Final answer
x = 176.69
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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.