Finding the Fourth Proportional to 355.23, 490.19 and 207.84
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Solution
The fourth proportional to 355.23, 490.19 and 207.84 is: 286.79
Step by Step Solution
- Step 1: Write the proportion equation
355.23 : 490.19 = 207.84 : x - Step 2: Convert to fraction form
355.23/490.19 = 207.84/x - Step 3: Cross multiply
355.23x = 490.19 × 207.84 - Step 4: Simplify right side
355.23x = 101,877.60 - Step 5: Solve for x
x = 101,877.60/355.23 - Step 6: Final answer
x = 286.79
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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.