Finding the Fourth Proportional to 1,007,749.12, 1,390,629.96 and 555,040.12
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Solution
The fourth proportional to 1,007,749.12, 1,390,629.96 and 555,040.12 is: 765,920.21
Step by Step Solution
- Step 1: Write the proportion equation
1,007,749.12 : 1,390,629.96 = 555,040.12 : x - Step 2: Convert to fraction form
1,007,749.12/1,390,629.96 = 555,040.12/x - Step 3: Cross multiply
1,007,749.12x = 1,390,629.96 × 555,040.12 - Step 4: Simplify right side
1,007,749.12x = 771,855,419,874.00 - Step 5: Solve for x
x = 771,855,419,874.00/1,007,749.12 - Step 6: Final answer
x = 765,920.21
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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.