Finding the Fourth Proportional to 811,487.80, 1,217,231.70 and 212,447.80
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Solution
The fourth proportional to 811,487.80, 1,217,231.70 and 212,447.80 is: 318,671.70
Step by Step Solution
- Step 1: Write the proportion equation
811,487.80 : 1,217,231.70 = 212,447.80 : x - Step 2: Convert to fraction form
811,487.80/1,217,231.70 = 212,447.80/x - Step 3: Cross multiply
811,487.80x = 1,217,231.70 × 212,447.80 - Step 4: Simplify right side
811,487.80x = 258,598,196,755.26 - Step 5: Solve for x
x = 258,598,196,755.26/811,487.80 - Step 6: Final answer
x = 318,671.70
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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.