Finding the Fourth Proportional to 317.99, 438.78 and 193.63
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Solution
The fourth proportional to 317.99, 438.78 and 193.63 is: 267.18
Step by Step Solution
- Step 1: Write the proportion equation
317.99 : 438.78 = 193.63 : x - Step 2: Convert to fraction form
317.99/438.78 = 193.63/x - Step 3: Cross multiply
317.99x = 438.78 × 193.63 - Step 4: Simplify right side
317.99x = 84,960.97 - Step 5: Solve for x
x = 84,960.97/317.99 - Step 6: Final answer
x = 267.18
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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.