Finding the Fourth Proportional to 289.90, 400.08 and 201.43
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Solution
The fourth proportional to 289.90, 400.08 and 201.43 is: 277.99
Step by Step Solution
- Step 1: Write the proportion equation
289.90 : 400.08 = 201.43 : x - Step 2: Convert to fraction form
289.90/400.08 = 201.43/x - Step 3: Cross multiply
289.90x = 400.08 × 201.43 - Step 4: Simplify right side
289.90x = 80,588.11 - Step 5: Solve for x
x = 80,588.11/289.90 - Step 6: Final answer
x = 277.99
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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.