Finding the Fourth Proportional to 392.91, 589.12 and 129.26
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Solution
The fourth proportional to 392.91, 589.12 and 129.26 is: 193.80
Step by Step Solution
- Step 1: Write the proportion equation
392.91 : 589.12 = 129.26 : x - Step 2: Convert to fraction form
392.91/589.12 = 129.26/x - Step 3: Cross multiply
392.91x = 589.12 × 129.26 - Step 4: Simplify right side
392.91x = 76,146.06 - Step 5: Solve for x
x = 76,146.06/392.91 - Step 6: Final answer
x = 193.80
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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.