Finding the Fourth Proportional to 317.11, 475.81 and 143.82
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Solution
The fourth proportional to 317.11, 475.81 and 143.82 is: 215.80
Step by Step Solution
- Step 1: Write the proportion equation
317.11 : 475.81 = 143.82 : x - Step 2: Convert to fraction form
317.11/475.81 = 143.82/x - Step 3: Cross multiply
317.11x = 475.81 × 143.82 - Step 4: Simplify right side
317.11x = 68,430.99 - Step 5: Solve for x
x = 68,430.99/317.11 - Step 6: Final answer
x = 215.80
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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.