Finding the Fourth Proportional to 355.23, 490.19 and 207.85
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Solution
The fourth proportional to 355.23, 490.19 and 207.85 is: 286.82
Step by Step Solution
- Step 1: Write the proportion equation
355.23 : 490.19 = 207.85 : x - Step 2: Convert to fraction form
355.23/490.19 = 207.85/x - Step 3: Cross multiply
355.23x = 490.19 × 207.85 - Step 4: Simplify right side
355.23x = 101,885.99 - Step 5: Solve for x
x = 101,885.99/355.23 - Step 6: Final answer
x = 286.82
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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.