Finding the Fourth Proportional to 1,128,087.50, 1,556,760.75 and 618,791.09
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Solution
The fourth proportional to 1,128,087.50, 1,556,760.75 and 618,791.09 is: 853,931.70
Step by Step Solution
- Step 1: Write the proportion equation
1,128,087.50 : 1,556,760.75 = 618,791.09 : x - Step 2: Convert to fraction form
1,128,087.50/1,556,760.75 = 618,791.09/x - Step 3: Cross multiply
1,128,087.50x = 1,556,760.75 × 618,791.09 - Step 4: Simplify right side
1,128,087.50x = 963,309,681,361.72 - Step 5: Solve for x
x = 963,309,681,361.72/1,128,087.50 - Step 6: Final answer
x = 853,931.70
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1.5x scale
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.