Finding the Fourth Proportional to 393.79, 590.99 and 198.99
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Solution
The fourth proportional to 393.79, 590.99 and 198.99 is: 298.64
Step by Step Solution
- Step 1: Write the proportion equation
393.79 : 590.99 = 198.99 : x - Step 2: Convert to fraction form
393.79/590.99 = 198.99/x - Step 3: Cross multiply
393.79x = 590.99 × 198.99 - Step 4: Simplify right side
393.79x = 117,601.10 - Step 5: Solve for x
x = 117,601.10/393.79 - Step 6: Final answer
x = 298.64
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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.