Finding the Fourth Proportional to 239.81, 331.08 and 157.06
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Solution
The fourth proportional to 239.81, 331.08 and 157.06 is: 216.83
Step by Step Solution
- Step 1: Write the proportion equation
239.81 : 331.08 = 157.06 : x - Step 2: Convert to fraction form
239.81/331.08 = 157.06/x - Step 3: Cross multiply
239.81x = 331.08 × 157.06 - Step 4: Simplify right side
239.81x = 51,997.77 - Step 5: Solve for x
x = 51,997.77/239.81 - Step 6: Final answer
x = 216.83
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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.