Finding the Fourth Proportional to 989.44, 1,483.84 and 331.18
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Solution
The fourth proportional to 989.44, 1,483.84 and 331.18 is: 496.66
Step by Step Solution
- Step 1: Write the proportion equation
989.44 : 1,483.84 = 331.18 : x - Step 2: Convert to fraction form
989.44/1,483.84 = 331.18/x - Step 3: Cross multiply
989.44x = 1,483.84 × 331.18 - Step 4: Simplify right side
989.44x = 491,418.13 - Step 5: Solve for x
x = 491,418.13/989.44 - Step 6: Final answer
x = 496.66
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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.