Finding the Third Proportional to 638,712 and 1,390,824
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Solution
The third proportional to 638,712 and 1,390,824 is: 3,028,581.58
Step by Step Solution
- Step 1: Write the proportion equation
638,712 : 1,390,824 = 1,390,824 : x - Step 2: Convert to fraction form
638,712/1,390,824 = 1,390,824/x - Step 3: Cross multiply
638,712x = 1,390,824 × 1,390,824 - Step 4: Simplify right side
638,712x = 1,934,391,398,976 - Step 5: Solve for x
x = 1,934,391,398,976/638,712 - Step 6: Final answer
x = 3,028,581.58
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Why These Related Problems?
These problems maintain the same ratio (2.18) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.