Home / 813,984.20-1,122,003.60-641,622.68

Finding the Fourth Proportional to 813,984.20, 1,122,003.60 and 641,622.68

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Solution

The fourth proportional to 813,984.20, 1,122,003.60 and 641,622.68 is: 884,418.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    813,984.20 : 1,122,003.60 = 641,622.68 : x
  2. Step 2: Convert to fraction form
    813,984.20/1,122,003.60 = 641,622.68/x
  3. Step 3: Cross multiply
    813,984.20x = 1,122,003.60 × 641,622.68
  4. Step 4: Simplify right side
    813,984.20x = 719,902,956,801.65
  5. Step 5: Solve for x
    x = 719,902,956,801.65/813,984.20
  6. Step 6: Final answer
    x = 884,418.83

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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.