Finding the Fourth Proportional to 239.81, 330.91 and 141.55
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Solution
The fourth proportional to 239.81, 330.91 and 141.55 is: 195.32
Step by Step Solution
- Step 1: Write the proportion equation
239.81 : 330.91 = 141.55 : x - Step 2: Convert to fraction form
239.81/330.91 = 141.55/x - Step 3: Cross multiply
239.81x = 330.91 × 141.55 - Step 4: Simplify right side
239.81x = 46,839.13 - Step 5: Solve for x
x = 46,839.13/239.81 - Step 6: Final answer
x = 195.32
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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.