Finding the Third Proportional to 399 and 865.31
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Solution
The third proportional to 399 and 865.31 is: 1,876.61
Step by Step Solution
- Step 1: Write the proportion equation
399 : 865.31 = 865.31 : x - Step 2: Convert to fraction form
399/865.31 = 865.31/x - Step 3: Cross multiply
399x = 865.31 × 865.31 - Step 4: Simplify right side
399x = 748,765.72 - Step 5: Solve for x
x = 748,765.72/399 - Step 6: Final answer
x = 1,876.61
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Why These Related Problems?
These problems maintain the same ratio (2.17) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.