Finding the Fourth Proportional to 318.23, 438.84 and 239.73
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Solution
The fourth proportional to 318.23, 438.84 and 239.73 is: 330.59
Step by Step Solution
- Step 1: Write the proportion equation
318.23 : 438.84 = 239.73 : x - Step 2: Convert to fraction form
318.23/438.84 = 239.73/x - Step 3: Cross multiply
318.23x = 438.84 × 239.73 - Step 4: Simplify right side
318.23x = 105,203.11 - Step 5: Solve for x
x = 105,203.11/318.23 - 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.