Finding the Fourth Proportional to 317.87, 438.80 and 207.44
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Solution
The fourth proportional to 317.87, 438.80 and 207.44 is: 286.35
Step by Step Solution
- Step 1: Write the proportion equation
317.87 : 438.80 = 207.44 : x - Step 2: Convert to fraction form
317.87/438.80 = 207.44/x - Step 3: Cross multiply
317.87x = 438.80 × 207.44 - Step 4: Simplify right side
317.87x = 91,023.63 - Step 5: Solve for x
x = 91,023.63/317.87 - Step 6: Final answer
x = 286.35
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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.