Finding the Fourth Proportional to 239.21, 330.21 and 202.56
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Solution
The fourth proportional to 239.21, 330.21 and 202.56 is: 279.61
Step by Step Solution
- Step 1: Write the proportion equation
239.21 : 330.21 = 202.56 : x - Step 2: Convert to fraction form
239.21/330.21 = 202.56/x - Step 3: Cross multiply
239.21x = 330.21 × 202.56 - Step 4: Simplify right side
239.21x = 66,884.67 - Step 5: Solve for x
x = 66,884.67/239.21 - Step 6: Final answer
x = 279.61
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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.