Finding the Fourth Proportional to 355.21, 489.68 and 249.99
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Solution
The fourth proportional to 355.21, 489.68 and 249.99 is: 344.63
Step by Step Solution
- Step 1: Write the proportion equation
355.21 : 489.68 = 249.99 : x - Step 2: Convert to fraction form
355.21/489.68 = 249.99/x - Step 3: Cross multiply
355.21x = 489.68 × 249.99 - Step 4: Simplify right side
355.21x = 122,415.10 - Step 5: Solve for x
x = 122,415.10/355.21 - Step 6: Final answer
x = 344.63
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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.