Finding the Fourth Proportional to 716.99, 989.42 and 422.08
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Solution
The fourth proportional to 716.99, 989.42 and 422.08 is: 582.45
Step by Step Solution
- Step 1: Write the proportion equation
716.99 : 989.42 = 422.08 : x - Step 2: Convert to fraction form
716.99/989.42 = 422.08/x - Step 3: Cross multiply
716.99x = 989.42 × 422.08 - Step 4: Simplify right side
716.99x = 417,609.81 - Step 5: Solve for x
x = 417,609.81/716.99 - Step 6: Final answer
x = 582.45
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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.