Finding the Fourth Proportional to 393.91, 590.86 and 119.99
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Solution
The fourth proportional to 393.91, 590.86 and 119.99 is: 179.99
Step by Step Solution
- Step 1: Write the proportion equation
393.91 : 590.86 = 119.99 : x - Step 2: Convert to fraction form
393.91/590.86 = 119.99/x - Step 3: Cross multiply
393.91x = 590.86 × 119.99 - Step 4: Simplify right side
393.91x = 70,896.99 - Step 5: Solve for x
x = 70,896.99/393.91 - Step 6: Final answer
x = 179.99
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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.