Finding the Fourth Proportional to 201.49, 302.10 and 79.87
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Solution
The fourth proportional to 201.49, 302.10 and 79.87 is: 119.75
Step by Step Solution
- Step 1: Write the proportion equation
201.49 : 302.10 = 79.87 : x - Step 2: Convert to fraction form
201.49/302.10 = 79.87/x - Step 3: Cross multiply
201.49x = 302.10 × 79.87 - Step 4: Simplify right side
201.49x = 24,128.73 - Step 5: Solve for x
x = 24,128.73/201.49 - Step 6: Final answer
x = 119.75
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Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.