Finding the Fourth Proportional to 393.19, 590.02 and 219.78
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Solution
The fourth proportional to 393.19, 590.02 and 219.78 is: 329.80
Step by Step Solution
- Step 1: Write the proportion equation
393.19 : 590.02 = 219.78 : x - Step 2: Convert to fraction form
393.19/590.02 = 219.78/x - Step 3: Cross multiply
393.19x = 590.02 × 219.78 - Step 4: Simplify right side
393.19x = 129,674.05 - Step 5: Solve for x
x = 129,674.05/393.19 - Step 6: Final answer
x = 329.80
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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.