Finding the Fourth Proportional to 411,891.40, 617,961.84 and 172,121.68
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Solution
The fourth proportional to 411,891.40, 617,961.84 and 172,121.68 is: 258,234.65
Step by Step Solution
- Step 1: Write the proportion equation
411,891.40 : 617,961.84 = 172,121.68 : x - Step 2: Convert to fraction form
411,891.40/617,961.84 = 172,121.68/x - Step 3: Cross multiply
411,891.40x = 617,961.84 × 172,121.68 - Step 4: Simplify right side
411,891.40x = 106,364,630,076.69 - Step 5: Solve for x
x = 106,364,630,076.69/411,891.40 - Step 6: Final answer
x = 258,234.65
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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.