Finding the Fourth Proportional to 686,416.19, 1,029,630.36 and 281,830.91
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Solution
The fourth proportional to 686,416.19, 1,029,630.36 and 281,830.91 is: 422,748.86
Step by Step Solution
- Step 1: Write the proportion equation
686,416.19 : 1,029,630.36 = 281,830.91 : x - Step 2: Convert to fraction form
686,416.19/1,029,630.36 = 281,830.91/x - Step 3: Cross multiply
686,416.19x = 1,029,630.36 × 281,830.91 - Step 4: Simplify right side
686,416.19x = 290,181,661,322.43 - Step 5: Solve for x
x = 290,181,661,322.43/686,416.19 - Step 6: Final answer
x = 422,748.86
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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.