Finding the Fourth Proportional to 317.66, 438.21 and 193.19
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Solution
The fourth proportional to 317.66, 438.21 and 193.19 is: 266.50
Step by Step Solution
- Step 1: Write the proportion equation
317.66 : 438.21 = 193.19 : x - Step 2: Convert to fraction form
317.66/438.21 = 193.19/x - Step 3: Cross multiply
317.66x = 438.21 × 193.19 - Step 4: Simplify right side
317.66x = 84,655.60 - Step 5: Solve for x
x = 84,655.60/317.66 - Step 6: Final answer
x = 266.50
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Why These Related Problems?
These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.