Finding the Fourth Proportional to 239.88, 331.08 and 156.84
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Solution
The fourth proportional to 239.88, 331.08 and 156.84 is: 216.46
Step by Step Solution
- Step 1: Write the proportion equation
239.88 : 331.08 = 156.84 : x - Step 2: Convert to fraction form
239.88/331.08 = 156.84/x - Step 3: Cross multiply
239.88x = 331.08 × 156.84 - Step 4: Simplify right side
239.88x = 51,924.76 - Step 5: Solve for x
x = 51,924.76/239.88 - Step 6: Final answer
x = 216.46
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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.