Finding the Fourth Proportional to 389.24, 583.79 and 129.26
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Solution
The fourth proportional to 389.24, 583.79 and 129.26 is: 193.86
Step by Step Solution
- Step 1: Write the proportion equation
389.24 : 583.79 = 129.26 : x - Step 2: Convert to fraction form
389.24/583.79 = 129.26/x - Step 3: Cross multiply
389.24x = 583.79 × 129.26 - Step 4: Simplify right side
389.24x = 75,457.13 - Step 5: Solve for x
x = 75,457.13/389.24 - Step 6: Final answer
x = 193.86
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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.