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Finding the Fourth Proportional to 543,847.80, 815,771.70 and 455,930.40

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Solution

The fourth proportional to 543,847.80, 815,771.70 and 455,930.40 is: 683,895.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    543,847.80 : 815,771.70 = 455,930.40 : x
  2. Step 2: Convert to fraction form
    543,847.80/815,771.70 = 455,930.40/x
  3. Step 3: Cross multiply
    543,847.80x = 815,771.70 × 455,930.40
  4. Step 4: Simplify right side
    543,847.80x = 371,935,117,489.68
  5. Step 5: Solve for x
    x = 371,935,117,489.68/543,847.80
  6. Step 6: Final answer
    x = 683,895.60

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Similar ratio
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1.5x scale

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.