Finding the Fourth Proportional to 855.18, 1,286.42 and 774.99
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Solution
The fourth proportional to 855.18, 1,286.42 and 774.99 is: 1,165.79
Step by Step Solution
- Step 1: Write the proportion equation
855.18 : 1,286.42 = 774.99 : x - Step 2: Convert to fraction form
855.18/1,286.42 = 774.99/x - Step 3: Cross multiply
855.18x = 1,286.42 × 774.99 - Step 4: Simplify right side
855.18x = 996,958.76 - Step 5: Solve for x
x = 996,958.76/855.18 - Step 6: Final answer
x = 1,165.79
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Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.