Home / 869,745.45-1,200,257.42-487,764.03

Finding the Fourth Proportional to 869,745.45, 1,200,257.42 and 487,764.03

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Solution

The fourth proportional to 869,745.45, 1,200,257.42 and 487,764.03 is: 673,119.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    869,745.45 : 1,200,257.42 = 487,764.03 : x
  2. Step 2: Convert to fraction form
    869,745.45/1,200,257.42 = 487,764.03/x
  3. Step 3: Cross multiply
    869,745.45x = 1,200,257.42 × 487,764.03
  4. Step 4: Simplify right side
    869,745.45x = 585,442,393,777.78
  5. Step 5: Solve for x
    x = 585,442,393,777.78/869,745.45
  6. Step 6: Final answer
    x = 673,119.24

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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.