Finding the Fourth Proportional to 38.35, 52.90 and 30.99
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Solution
The fourth proportional to 38.35, 52.90 and 30.99 is: 42.75
Step by Step Solution
- Step 1: Write the proportion equation
38.35 : 52.90 = 30.99 : x - Step 2: Convert to fraction form
38.35/52.90 = 30.99/x - Step 3: Cross multiply
38.35x = 52.90 × 30.99 - Step 4: Simplify right side
38.35x = 1,639.37 - Step 5: Solve for x
x = 1,639.37/38.35 - Step 6: Final answer
x = 42.75
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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.