Finding the Fourth Proportional to 1,125,920.88, 1,553,384.97 and 642,138.12
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Solution
The fourth proportional to 1,125,920.88, 1,553,384.97 and 642,138.12 is: 885,930.55
Step by Step Solution
- Step 1: Write the proportion equation
1,125,920.88 : 1,553,384.97 = 642,138.12 : x - Step 2: Convert to fraction form
1,125,920.88/1,553,384.97 = 642,138.12/x - Step 3: Cross multiply
1,125,920.88x = 1,553,384.97 × 642,138.12 - Step 4: Simplify right side
1,125,920.88x = 997,487,704,272.06 - Step 5: Solve for x
x = 997,487,704,272.06/1,125,920.88 - Step 6: Final answer
x = 885,930.55
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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.