Finding the Fourth Proportional to 239.90, 331.05 and 134.99
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Solution
The fourth proportional to 239.90, 331.05 and 134.99 is: 186.28
Step by Step Solution
- Step 1: Write the proportion equation
239.90 : 331.05 = 134.99 : x - Step 2: Convert to fraction form
239.90/331.05 = 134.99/x - Step 3: Cross multiply
239.90x = 331.05 × 134.99 - Step 4: Simplify right side
239.90x = 44,688.44 - Step 5: Solve for x
x = 44,688.44/239.90 - Step 6: Final answer
x = 186.28
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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.