Finding the Fourth Proportional to 438.91, 605.68 and 239.74
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Solution
The fourth proportional to 438.91, 605.68 and 239.74 is: 330.83
Step by Step Solution
- Step 1: Write the proportion equation
438.91 : 605.68 = 239.74 : x - Step 2: Convert to fraction form
438.91/605.68 = 239.74/x - Step 3: Cross multiply
438.91x = 605.68 × 239.74 - Step 4: Simplify right side
438.91x = 145,204.70 - Step 5: Solve for x
x = 145,204.70/438.91 - Step 6: Final answer
x = 330.83
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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.