Finding the Fourth Proportional to 664.14, 916.71 and 489.99
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Solution
The fourth proportional to 664.14, 916.71 and 489.99 is: 676.33
Step by Step Solution
- Step 1: Write the proportion equation
664.14 : 916.71 = 489.99 : x - Step 2: Convert to fraction form
664.14/916.71 = 489.99/x - Step 3: Cross multiply
664.14x = 916.71 × 489.99 - Step 4: Simplify right side
664.14x = 449,178.73 - Step 5: Solve for x
x = 449,178.73/664.14 - Step 6: Final answer
x = 676.33
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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.