Finding the Fourth Proportional to 286.44, 394.98 and 208.68
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Solution
The fourth proportional to 286.44, 394.98 and 208.68 is: 287.75
Step by Step Solution
- Step 1: Write the proportion equation
286.44 : 394.98 = 208.68 : x - Step 2: Convert to fraction form
286.44/394.98 = 208.68/x - Step 3: Cross multiply
286.44x = 394.98 × 208.68 - Step 4: Simplify right side
286.44x = 82,424.43 - Step 5: Solve for x
x = 82,424.43/286.44 - Step 6: Final answer
x = 287.75
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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.