Finding the Fourth Proportional to 289.11, 398.99 and 171.12
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Solution
The fourth proportional to 289.11, 398.99 and 171.12 is: 236.16
Step by Step Solution
- Step 1: Write the proportion equation
289.11 : 398.99 = 171.12 : x - Step 2: Convert to fraction form
289.11/398.99 = 171.12/x - Step 3: Cross multiply
289.11x = 398.99 × 171.12 - Step 4: Simplify right side
289.11x = 68,277.09 - Step 5: Solve for x
x = 68,277.09/289.11 - Step 6: Final answer
x = 236.16
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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.