Finding the Fourth Proportional to 717.96, 990 and 484.68
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Solution
The fourth proportional to 717.96, 990 and 484.68 is: 668.33
Step by Step Solution
- Step 1: Write the proportion equation
717.96 : 990 = 484.68 : x - Step 2: Convert to fraction form
717.96/990 = 484.68/x - Step 3: Cross multiply
717.96x = 990 × 484.68 - Step 4: Simplify right side
717.96x = 479,833.20 - Step 5: Solve for x
x = 479,833.20/717.96 - Step 6: Final answer
x = 668.33
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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.