Finding the Fourth Proportional to 393.18, 589.77 and 115.55
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Solution
The fourth proportional to 393.18, 589.77 and 115.55 is: 173.32
Step by Step Solution
- Step 1: Write the proportion equation
393.18 : 589.77 = 115.55 : x - Step 2: Convert to fraction form
393.18/589.77 = 115.55/x - Step 3: Cross multiply
393.18x = 589.77 × 115.55 - Step 4: Simplify right side
393.18x = 68,147.19 - Step 5: Solve for x
x = 68,147.19/393.18 - Step 6: Final answer
x = 173.32
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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.