Finding the Fourth Proportional to 420.44, 580.21 and 236.44
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Solution
The fourth proportional to 420.44, 580.21 and 236.44 is: 326.28
Step by Step Solution
- Step 1: Write the proportion equation
420.44 : 580.21 = 236.44 : x - Step 2: Convert to fraction form
420.44/580.21 = 236.44/x - Step 3: Cross multiply
420.44x = 580.21 × 236.44 - Step 4: Simplify right side
420.44x = 137,182.22 - Step 5: Solve for x
x = 137,182.22/420.44 - Step 6: Final answer
x = 326.28
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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.