Finding the Fourth Proportional to 355.06, 490.08 and 272.08
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Solution
The fourth proportional to 355.06, 490.08 and 272.08 is: 375.54
Step by Step Solution
- Step 1: Write the proportion equation
355.06 : 490.08 = 272.08 : x - Step 2: Convert to fraction form
355.06/490.08 = 272.08/x - Step 3: Cross multiply
355.06x = 490.08 × 272.08 - Step 4: Simplify right side
355.06x = 133,340.97 - Step 5: Solve for x
x = 133,340.97/355.06 - Step 6: Final answer
x = 375.54
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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.