Finding the Fourth Proportional to 207.97, 287.08 and 142.70
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Solution
The fourth proportional to 207.97, 287.08 and 142.70 is: 196.98
Step by Step Solution
- Step 1: Write the proportion equation
207.97 : 287.08 = 142.70 : x - Step 2: Convert to fraction form
207.97/287.08 = 142.70/x - Step 3: Cross multiply
207.97x = 287.08 × 142.70 - Step 4: Simplify right side
207.97x = 40,964.52 - Step 5: Solve for x
x = 40,964.52/207.97 - Step 6: Final answer
x = 196.98
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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.