Finding the Fourth Proportional to 1,172,227,487.12, 1,617,677,115.28 and 643,625,711.36
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Solution
The fourth proportional to 1,172,227,487.12, 1,617,677,115.28 and 643,625,711.36 is: 888,205,229.37
Step by Step Solution
- Step 1: Write the proportion equation
1,172,227,487.12 : 1,617,677,115.28 = 643,625,711.36 : x - Step 2: Convert to fraction form
1,172,227,487.12/1,617,677,115.28 = 643,625,711.36/x - Step 3: Cross multiply
1,172,227,487.12x = 1,617,677,115.28 × 643,625,711.36 - Step 4: Simplify right side
1,172,227,487.12x = 1,041,178,584,072,882,688 - Step 5: Solve for x
x = 1,041,178,584,072,882,688/1,172,227,487.12 - Step 6: Final answer
x = 888,205,229.37
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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.