Finding the Fourth Proportional to 812,309.20, 1,217,599.80 and 391,310.80
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Solution
The fourth proportional to 812,309.20, 1,217,599.80 and 391,310.80 is: 586,549.99
Step by Step Solution
- Step 1: Write the proportion equation
812,309.20 : 1,217,599.80 = 391,310.80 : x - Step 2: Convert to fraction form
812,309.20/1,217,599.80 = 391,310.80/x - Step 3: Cross multiply
812,309.20x = 1,217,599.80 × 391,310.80 - Step 4: Simplify right side
812,309.20x = 476,459,951,817.84 - Step 5: Solve for x
x = 476,459,951,817.84/812,309.20 - Step 6: Final answer
x = 586,549.99
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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.