Finding the Fourth Proportional to 286.08, 394.79 and 161.74
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Solution
The fourth proportional to 286.08, 394.79 and 161.74 is: 223.20
Step by Step Solution
- Step 1: Write the proportion equation
286.08 : 394.79 = 161.74 : x - Step 2: Convert to fraction form
286.08/394.79 = 161.74/x - Step 3: Cross multiply
286.08x = 394.79 × 161.74 - Step 4: Simplify right side
286.08x = 63,852.75 - Step 5: Solve for x
x = 63,852.75/286.08 - Step 6: Final answer
x = 223.20
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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.