Finding the Fourth Proportional to 207.70, 285.09 and 189.17
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Solution
The fourth proportional to 207.70, 285.09 and 189.17 is: 259.66
Step by Step Solution
- Step 1: Write the proportion equation
207.70 : 285.09 = 189.17 : x - Step 2: Convert to fraction form
207.70/285.09 = 189.17/x - Step 3: Cross multiply
207.70x = 285.09 × 189.17 - Step 4: Simplify right side
207.70x = 53,930.48 - Step 5: Solve for x
x = 53,930.48/207.70 - Step 6: Final answer
x = 259.66
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Why These Related Problems?
These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.