Finding the Fourth Proportional to 686,102.80, 1,029,154.20 and 312,125.80
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Solution
The fourth proportional to 686,102.80, 1,029,154.20 and 312,125.80 is: 468,188.70
Step by Step Solution
- Step 1: Write the proportion equation
686,102.80 : 1,029,154.20 = 312,125.80 : x - Step 2: Convert to fraction form
686,102.80/1,029,154.20 = 312,125.80/x - Step 3: Cross multiply
686,102.80x = 1,029,154.20 × 312,125.80 - Step 4: Simplify right side
686,102.80x = 321,225,577,998.36 - Step 5: Solve for x
x = 321,225,577,998.36/686,102.80 - Step 6: Final answer
x = 468,188.70
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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.