Finding the Fourth Proportional to 239.26, 358.81 and 76.90
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Solution
The fourth proportional to 239.26, 358.81 and 76.90 is: 115.32
Step by Step Solution
- Step 1: Write the proportion equation
239.26 : 358.81 = 76.90 : x - Step 2: Convert to fraction form
239.26/358.81 = 76.90/x - Step 3: Cross multiply
239.26x = 358.81 × 76.90 - Step 4: Simplify right side
239.26x = 27,592.49 - Step 5: Solve for x
x = 27,592.49/239.26 - Step 6: Final answer
x = 115.32
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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.