Finding the Third Proportional to 1,390.78 and 2,163.09
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Solution
The third proportional to 1,390.78 and 2,163.09 is: 3,364.28
Step by Step Solution
- Step 1: Write the proportion equation
1,390.78 : 2,163.09 = 2,163.09 : x - Step 2: Convert to fraction form
1,390.78/2,163.09 = 2,163.09/x - Step 3: Cross multiply
1,390.78x = 2,163.09 × 2,163.09 - Step 4: Simplify right side
1,390.78x = 4,678,974.57 - Step 5: Solve for x
x = 4,678,974.57/1,390.78 - Step 6: Final answer
x = 3,364.28
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These problems maintain the same ratio (1.56) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.