Finding the Fourth Proportional to 38.78, 53.42 and 37.99
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Solution
The fourth proportional to 38.78, 53.42 and 37.99 is: 52.33
Step by Step Solution
- Step 1: Write the proportion equation
38.78 : 53.42 = 37.99 : x - Step 2: Convert to fraction form
38.78/53.42 = 37.99/x - Step 3: Cross multiply
38.78x = 53.42 × 37.99 - Step 4: Simplify right side
38.78x = 2,029.43 - Step 5: Solve for x
x = 2,029.43/38.78 - Step 6: Final answer
x = 52.33
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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.