Finding the Fourth Proportional to 393.98, 590.21 and 239.99
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Solution
The fourth proportional to 393.98, 590.21 and 239.99 is: 359.52
Step by Step Solution
- Step 1: Write the proportion equation
393.98 : 590.21 = 239.99 : x - Step 2: Convert to fraction form
393.98/590.21 = 239.99/x - Step 3: Cross multiply
393.98x = 590.21 × 239.99 - Step 4: Simplify right side
393.98x = 141,640.35 - Step 5: Solve for x
x = 141,640.35/393.98 - Step 6: Final answer
x = 359.52
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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.