Finding the Fourth Proportional to 207.80, 311.73 and 171.28
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Solution
The fourth proportional to 207.80, 311.73 and 171.28 is: 256.94
Step by Step Solution
- Step 1: Write the proportion equation
207.80 : 311.73 = 171.28 : x - Step 2: Convert to fraction form
207.80/311.73 = 171.28/x - Step 3: Cross multiply
207.80x = 311.73 × 171.28 - Step 4: Simplify right side
207.80x = 53,393.11 - Step 5: Solve for x
x = 53,393.11/207.80 - Step 6: Final answer
x = 256.94
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Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.