Finding the Fourth Proportional to 1,125,402.90, 1,553,203.84 and 641,857.20
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Solution
The fourth proportional to 1,125,402.90, 1,553,203.84 and 641,857.20 is: 885,847.25
Step by Step Solution
- Step 1: Write the proportion equation
1,125,402.90 : 1,553,203.84 = 641,857.20 : x - Step 2: Convert to fraction form
1,125,402.90/1,553,203.84 = 641,857.20/x - Step 3: Cross multiply
1,125,402.90x = 1,553,203.84 × 641,857.20 - Step 4: Simplify right side
1,125,402.90x = 996,935,067,771.65 - Step 5: Solve for x
x = 996,935,067,771.65/1,125,402.90 - Step 6: Final answer
x = 885,847.25
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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.