Finding the Fourth Proportional to 936.19, 1,290.94 and 640.99
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Solution
The fourth proportional to 936.19, 1,290.94 and 640.99 is: 883.88
Step by Step Solution
- Step 1: Write the proportion equation
936.19 : 1,290.94 = 640.99 : x - Step 2: Convert to fraction form
936.19/1,290.94 = 640.99/x - Step 3: Cross multiply
936.19x = 1,290.94 × 640.99 - Step 4: Simplify right side
936.19x = 827,479.63 - Step 5: Solve for x
x = 827,479.63/936.19 - Step 6: Final answer
x = 883.88
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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.