Finding the Fourth Proportional to 239.01, 329.91 and 221.70
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Solution
The fourth proportional to 239.01, 329.91 and 221.70 is: 306.02
Step by Step Solution
- Step 1: Write the proportion equation
239.01 : 329.91 = 221.70 : x - Step 2: Convert to fraction form
239.01/329.91 = 221.70/x - Step 3: Cross multiply
239.01x = 329.91 × 221.70 - Step 4: Simplify right side
239.01x = 73,141.05 - Step 5: Solve for x
x = 73,141.05/239.01 - Step 6: Final answer
x = 306.02
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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.