Finding the Fourth Proportional to 1,128,367.74, 1,557,147.49 and 644,943.27
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Solution
The fourth proportional to 1,128,367.74, 1,557,147.49 and 644,943.27 is: 890,021.72
Step by Step Solution
- Step 1: Write the proportion equation
1,128,367.74 : 1,557,147.49 = 644,943.27 : x - Step 2: Convert to fraction form
1,128,367.74/1,557,147.49 = 644,943.27/x - Step 3: Cross multiply
1,128,367.74x = 1,557,147.49 × 644,943.27 - Step 4: Simplify right side
1,128,367.74x = 1,004,271,798,299.84 - Step 5: Solve for x
x = 1,004,271,798,299.84/1,128,367.74 - Step 6: Final answer
x = 890,021.72
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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.