Finding the Fourth Proportional to 399.18, 550.70 and 239.63
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Solution
The fourth proportional to 399.18, 550.70 and 239.63 is: 330.59
Step by Step Solution
- Step 1: Write the proportion equation
399.18 : 550.70 = 239.63 : x - Step 2: Convert to fraction form
399.18/550.70 = 239.63/x - Step 3: Cross multiply
399.18x = 550.70 × 239.63 - Step 4: Simplify right side
399.18x = 131,964.24 - Step 5: Solve for x
x = 131,964.24/399.18 - Step 6: Final answer
x = 330.59
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Why These Related Problems?
These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.