Finding the Fourth Proportional to 427,983.91, 641,974.32 and 128,463.19
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Solution
The fourth proportional to 427,983.91, 641,974.32 and 128,463.19 is: 192,694.32
Step by Step Solution
- Step 1: Write the proportion equation
427,983.91 : 641,974.32 = 128,463.19 : x - Step 2: Convert to fraction form
427,983.91/641,974.32 = 128,463.19/x - Step 3: Cross multiply
427,983.91x = 641,974.32 × 128,463.19 - Step 4: Simplify right side
427,983.91x = 82,470,069,045.28 - Step 5: Solve for x
x = 82,470,069,045.28/427,983.91 - Step 6: Final answer
x = 192,694.32
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Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.