Home / 693,105.20-1,040,003.40-393,815.60

Finding the Fourth Proportional to 693,105.20, 1,040,003.40 and 393,815.60

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Solution

The fourth proportional to 693,105.20, 1,040,003.40 and 393,815.60 is: 590,919.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    693,105.20 : 1,040,003.40 = 393,815.60 : x
  2. Step 2: Convert to fraction form
    693,105.20/1,040,003.40 = 393,815.60/x
  3. Step 3: Cross multiply
    693,105.20x = 1,040,003.40 × 393,815.60
  4. Step 4: Simplify right side
    693,105.20x = 409,569,562,973.04
  5. Step 5: Solve for x
    x = 409,569,562,973.04/693,105.20
  6. Step 6: Final answer
    x = 590,919.77

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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.