Finding the Fourth Proportional to 338.67, 508.21 and 133.20
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Solution
The fourth proportional to 338.67, 508.21 and 133.20 is: 199.88
Step by Step Solution
- Step 1: Write the proportion equation
338.67 : 508.21 = 133.20 : x - Step 2: Convert to fraction form
338.67/508.21 = 133.20/x - Step 3: Cross multiply
338.67x = 508.21 × 133.20 - Step 4: Simplify right side
338.67x = 67,691.97 - Step 5: Solve for x
x = 67,691.97/338.67 - Step 6: Final answer
x = 199.88
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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.