Finding the Fourth Proportional to 286.39, 428.99 and 170.49
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Solution
The fourth proportional to 286.39, 428.99 and 170.49 is: 255.39
Step by Step Solution
- Step 1: Write the proportion equation
286.39 : 428.99 = 170.49 : x - Step 2: Convert to fraction form
286.39/428.99 = 170.49/x - Step 3: Cross multiply
286.39x = 428.99 × 170.49 - Step 4: Simplify right side
286.39x = 73,138.51 - Step 5: Solve for x
x = 73,138.51/286.39 - Step 6: Final answer
x = 255.39
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Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.