Finding the Fourth Proportional to 355.11, 490.08 and 207.75
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Solution
The fourth proportional to 355.11, 490.08 and 207.75 is: 286.71
Step by Step Solution
- Step 1: Write the proportion equation
355.11 : 490.08 = 207.75 : x - Step 2: Convert to fraction form
355.11/490.08 = 207.75/x - Step 3: Cross multiply
355.11x = 490.08 × 207.75 - Step 4: Simplify right side
355.11x = 101,814.12 - Step 5: Solve for x
x = 101,814.12/355.11 - Step 6: Final answer
x = 286.71
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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.