Finding the Fourth Proportional to 636.21, 877.91 and 356.44
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Solution
The fourth proportional to 636.21, 877.91 and 356.44 is: 491.85
Step by Step Solution
- Step 1: Write the proportion equation
636.21 : 877.91 = 356.44 : x - Step 2: Convert to fraction form
636.21/877.91 = 356.44/x - Step 3: Cross multiply
636.21x = 877.91 × 356.44 - Step 4: Simplify right side
636.21x = 312,922.24 - Step 5: Solve for x
x = 312,922.24/636.21 - Step 6: Final answer
x = 491.85
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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.