Finding the Fourth Proportional to 355.26, 490.26 and 207.90
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Solution
The fourth proportional to 355.26, 490.26 and 207.90 is: 286.90
Step by Step Solution
- Step 1: Write the proportion equation
355.26 : 490.26 = 207.90 : x - Step 2: Convert to fraction form
355.26/490.26 = 207.90/x - Step 3: Cross multiply
355.26x = 490.26 × 207.90 - Step 4: Simplify right side
355.26x = 101,925.05 - Step 5: Solve for x
x = 101,925.05/355.26 - Step 6: Final answer
x = 286.90
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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.