Finding the Fourth Proportional to 489,187.20, 675,078.12 and 285,247.08
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Solution
The fourth proportional to 489,187.20, 675,078.12 and 285,247.08 is: 393,640.84
Step by Step Solution
- Step 1: Write the proportion equation
489,187.20 : 675,078.12 = 285,247.08 : x - Step 2: Convert to fraction form
489,187.20/675,078.12 = 285,247.08/x - Step 3: Cross multiply
489,187.20x = 675,078.12 × 285,247.08 - Step 4: Simplify right side
489,187.20x = 192,564,062,501.89 - Step 5: Solve for x
x = 192,564,062,501.89/489,187.20 - Step 6: Final answer
x = 393,640.84
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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.