Finding the Fourth Proportional to 717.44, 989.84 and 418.62
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Solution
The fourth proportional to 717.44, 989.84 and 418.62 is: 577.56
Step by Step Solution
- Step 1: Write the proportion equation
717.44 : 989.84 = 418.62 : x - Step 2: Convert to fraction form
717.44/989.84 = 418.62/x - Step 3: Cross multiply
717.44x = 989.84 × 418.62 - Step 4: Simplify right side
717.44x = 414,367.87 - Step 5: Solve for x
x = 414,367.87/717.44 - Step 6: Final answer
x = 577.56
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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.