Finding the Fourth Proportional to 1,128,279.32, 1,557,163.20 and 644,864.84
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Solution
The fourth proportional to 1,128,279.32, 1,557,163.20 and 644,864.84 is: 889,992.20
Step by Step Solution
- Step 1: Write the proportion equation
1,128,279.32 : 1,557,163.20 = 644,864.84 : x - Step 2: Convert to fraction form
1,128,279.32/1,557,163.20 = 644,864.84/x - Step 3: Cross multiply
1,128,279.32x = 1,557,163.20 × 644,864.84 - Step 4: Simplify right side
1,128,279.32x = 1,004,159,797,821.89 - Step 5: Solve for x
x = 1,004,159,797,821.89/1,128,279.32 - Step 6: Final answer
x = 889,992.20
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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.