Finding the Fourth Proportional to 201.64, 278.36 and 128.08
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Solution
The fourth proportional to 201.64, 278.36 and 128.08 is: 176.81
Step by Step Solution
- Step 1: Write the proportion equation
201.64 : 278.36 = 128.08 : x - Step 2: Convert to fraction form
201.64/278.36 = 128.08/x - Step 3: Cross multiply
201.64x = 278.36 × 128.08 - Step 4: Simplify right side
201.64x = 35,652.35 - Step 5: Solve for x
x = 35,652.35/201.64 - Step 6: Final answer
x = 176.81
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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.