Home / 869,745.20-1,200,257.07-487,763.78

Finding the Fourth Proportional to 869,745.20, 1,200,257.07 and 487,763.78

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Solution

The fourth proportional to 869,745.20, 1,200,257.07 and 487,763.78 is: 673,118.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    869,745.20 : 1,200,257.07 = 487,763.78 : x
  2. Step 2: Convert to fraction form
    869,745.20/1,200,257.07 = 487,763.78/x
  3. Step 3: Cross multiply
    869,745.20x = 1,200,257.07 × 487,763.78
  4. Step 4: Simplify right side
    869,745.20x = 585,441,925,434.93
  5. Step 5: Solve for x
    x = 585,441,925,434.93/869,745.20
  6. Step 6: Final answer
    x = 673,118.89

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1.5x scale

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.