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Finding the Fourth Proportional to 626,390.82, 864,790.56 and 411,900.80

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Solution

The fourth proportional to 626,390.82, 864,790.56 and 411,900.80 is: 568,667.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    626,390.82 : 864,790.56 = 411,900.80 : x
  2. Step 2: Convert to fraction form
    626,390.82/864,790.56 = 411,900.80/x
  3. Step 3: Cross multiply
    626,390.82x = 864,790.56 × 411,900.80
  4. Step 4: Simplify right side
    626,390.82x = 356,207,919,172.50
  5. Step 5: Solve for x
    x = 356,207,919,172.50/626,390.82
  6. Step 6: Final answer
    x = 568,667.21

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.