Finding the Fourth Proportional to 290.68, 401.21 and 178.62
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Solution
The fourth proportional to 290.68, 401.21 and 178.62 is: 246.54
Step by Step Solution
- Step 1: Write the proportion equation
290.68 : 401.21 = 178.62 : x - Step 2: Convert to fraction form
290.68/401.21 = 178.62/x - Step 3: Cross multiply
290.68x = 401.21 × 178.62 - Step 4: Simplify right side
290.68x = 71,663.24 - Step 5: Solve for x
x = 71,663.24/290.68 - Step 6: Final answer
x = 246.54
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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.