Finding the Fourth Proportional to 686,512.20, 1,029,768.30 and 621,193.80
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Solution
The fourth proportional to 686,512.20, 1,029,768.30 and 621,193.80 is: 931,790.70
Step by Step Solution
- Step 1: Write the proportion equation
686,512.20 : 1,029,768.30 = 621,193.80 : x - Step 2: Convert to fraction form
686,512.20/1,029,768.30 = 621,193.80/x - Step 3: Cross multiply
686,512.20x = 1,029,768.30 × 621,193.80 - Step 4: Simplify right side
686,512.20x = 639,685,683,396.54 - Step 5: Solve for x
x = 639,685,683,396.54/686,512.20 - Step 6: Final answer
x = 931,790.70
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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.