Finding the Fourth Proportional to 239.98, 331.19 and 157.14
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Solution
The fourth proportional to 239.98, 331.19 and 157.14 is: 216.86
Step by Step Solution
- Step 1: Write the proportion equation
239.98 : 331.19 = 157.14 : x - Step 2: Convert to fraction form
239.98/331.19 = 157.14/x - Step 3: Cross multiply
239.98x = 331.19 × 157.14 - Step 4: Simplify right side
239.98x = 52,043.20 - Step 5: Solve for x
x = 52,043.20/239.98 - Step 6: Final answer
x = 216.86
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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.