Finding the Fourth Proportional to 716.92, 989.21 and 495.79
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Solution
The fourth proportional to 716.92, 989.21 and 495.79 is: 684.09
Step by Step Solution
- Step 1: Write the proportion equation
716.92 : 989.21 = 495.79 : x - Step 2: Convert to fraction form
716.92/989.21 = 495.79/x - Step 3: Cross multiply
716.92x = 989.21 × 495.79 - Step 4: Simplify right side
716.92x = 490,439.19 - Step 5: Solve for x
x = 490,439.19/716.92 - Step 6: Final answer
x = 684.09
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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.