Finding the Fourth Proportional to 239.99, 331.20 and 135.09
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Solution
The fourth proportional to 239.99, 331.20 and 135.09 is: 186.44
Step by Step Solution
- Step 1: Write the proportion equation
239.99 : 331.20 = 135.09 : x - Step 2: Convert to fraction form
239.99/331.20 = 135.09/x - Step 3: Cross multiply
239.99x = 331.20 × 135.09 - Step 4: Simplify right side
239.99x = 44,741.81 - Step 5: Solve for x
x = 44,741.81/239.99 - Step 6: Final answer
x = 186.44
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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.