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Finding the Fourth Proportional to 640,745.56, 884,217.90 and 457,321.87

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Solution

The fourth proportional to 640,745.56, 884,217.90 and 457,321.87 is: 631,096.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,745.56 : 884,217.90 = 457,321.87 : x
  2. Step 2: Convert to fraction form
    640,745.56/884,217.90 = 457,321.87/x
  3. Step 3: Cross multiply
    640,745.56x = 884,217.90 × 457,321.87
  4. Step 4: Simplify right side
    640,745.56x = 404,372,183,515.47
  5. Step 5: Solve for x
    x = 404,372,183,515.47/640,745.56
  6. Step 6: Final answer
    x = 631,096.35

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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.