Finding the Fourth Proportional to 286.18, 394.92 and 155.19
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Solution
The fourth proportional to 286.18, 394.92 and 155.19 is: 214.16
Step by Step Solution
- Step 1: Write the proportion equation
286.18 : 394.92 = 155.19 : x - Step 2: Convert to fraction form
286.18/394.92 = 155.19/x - Step 3: Cross multiply
286.18x = 394.92 × 155.19 - Step 4: Simplify right side
286.18x = 61,286.44 - Step 5: Solve for x
x = 61,286.44/286.18 - Step 6: Final answer
x = 214.16
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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.