Finding the Fourth Proportional to 799.91, 1,199.90 and 389.39
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Solution
The fourth proportional to 799.91, 1,199.90 and 389.39 is: 584.10
Step by Step Solution
- Step 1: Write the proportion equation
799.91 : 1,199.90 = 389.39 : x - Step 2: Convert to fraction form
799.91/1,199.90 = 389.39/x - Step 3: Cross multiply
799.91x = 1,199.90 × 389.39 - Step 4: Simplify right side
799.91x = 467,228.59 - Step 5: Solve for x
x = 467,228.59/799.91 - Step 6: Final answer
x = 584.10
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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.