Finding the Fourth Proportional to 811,612.10, 1,217,405.85 and 279,137.75
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Solution
The fourth proportional to 811,612.10, 1,217,405.85 and 279,137.75 is: 418,702.39
Step by Step Solution
- Step 1: Write the proportion equation
811,612.10 : 1,217,405.85 = 279,137.75 : x - Step 2: Convert to fraction form
811,612.10/1,217,405.85 = 279,137.75/x - Step 3: Cross multiply
811,612.10x = 1,217,405.85 × 279,137.75 - Step 4: Simplify right side
811,612.10x = 339,823,924,242.19 - Step 5: Solve for x
x = 339,823,924,242.19/811,612.10 - Step 6: Final answer
x = 418,702.39
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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.