Home / 856,408.90-1,282,869.42-405,763.78

Finding the Fourth Proportional to 856,408.90, 1,282,869.42 and 405,763.78

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Solution

The fourth proportional to 856,408.90, 1,282,869.42 and 405,763.78 is: 607,819.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    856,408.90 : 1,282,869.42 = 405,763.78 : x
  2. Step 2: Convert to fraction form
    856,408.90/1,282,869.42 = 405,763.78/x
  3. Step 3: Cross multiply
    856,408.90x = 1,282,869.42 × 405,763.78
  4. Step 4: Simplify right side
    856,408.90x = 520,541,945,105.61
  5. Step 5: Solve for x
    x = 520,541,945,105.61/856,408.90
  6. Step 6: Final answer
    x = 607,819.40

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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.