Finding the Fourth Proportional to 39.42, 59.21 and 28.62
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Solution
The fourth proportional to 39.42, 59.21 and 28.62 is: 42.99
Step by Step Solution
- Step 1: Write the proportion equation
39.42 : 59.21 = 28.62 : x - Step 2: Convert to fraction form
39.42/59.21 = 28.62/x - Step 3: Cross multiply
39.42x = 59.21 × 28.62 - Step 4: Simplify right side
39.42x = 1,694.59 - Step 5: Solve for x
x = 1,694.59/39.42 - Step 6: Final answer
x = 42.99
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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.