Finding the Fourth Proportional to 38.79, 58.18 and 28.66
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Solution
The fourth proportional to 38.79, 58.18 and 28.66 is: 42.99
Step by Step Solution
- Step 1: Write the proportion equation
38.79 : 58.18 = 28.66 : x - Step 2: Convert to fraction form
38.79/58.18 = 28.66/x - Step 3: Cross multiply
38.79x = 58.18 × 28.66 - Step 4: Simplify right side
38.79x = 1,667.44 - Step 5: Solve for x
x = 1,667.44/38.79 - 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.