Finding the Fourth Proportional to 42.71, 58.97 and 28.19
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Solution
The fourth proportional to 42.71, 58.97 and 28.19 is: 38.92
Step by Step Solution
- Step 1: Write the proportion equation
42.71 : 58.97 = 28.19 : x - Step 2: Convert to fraction form
42.71/58.97 = 28.19/x - Step 3: Cross multiply
42.71x = 58.97 × 28.19 - Step 4: Simplify right side
42.71x = 1,662.22 - Step 5: Solve for x
x = 1,662.22/42.71 - Step 6: Final answer
x = 38.92
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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.