Finding the Fourth Proportional to 324.74, 487.07 and 81.26
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Solution
The fourth proportional to 324.74, 487.07 and 81.26 is: 121.89
Step by Step Solution
- Step 1: Write the proportion equation
324.74 : 487.07 = 81.26 : x - Step 2: Convert to fraction form
324.74/487.07 = 81.26/x - Step 3: Cross multiply
324.74x = 487.07 × 81.26 - Step 4: Simplify right side
324.74x = 39,580.80 - Step 5: Solve for x
x = 39,580.80/324.74 - Step 6: Final answer
x = 121.89
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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.