Finding the Fourth Proportional to 1,125,923.88, 1,553,389.11 and 642,141.12
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Solution
The fourth proportional to 1,125,923.88, 1,553,389.11 and 642,141.12 is: 885,934.69
Step by Step Solution
- Step 1: Write the proportion equation
1,125,923.88 : 1,553,389.11 = 642,141.12 : x - Step 2: Convert to fraction form
1,125,923.88/1,553,389.11 = 642,141.12/x - Step 3: Cross multiply
1,125,923.88x = 1,553,389.11 × 642,141.12 - Step 4: Simplify right side
1,125,923.88x = 997,495,022,891.20 - Step 5: Solve for x
x = 997,495,022,891.20/1,125,923.88 - Step 6: Final answer
x = 885,934.69
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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.