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Finding the Fourth Proportional to 713,584.20, 984,745.71 and 391,299.78

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Solution

The fourth proportional to 713,584.20, 984,745.71 and 391,299.78 is: 539,993.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    713,584.20 : 984,745.71 = 391,299.78 : x
  2. Step 2: Convert to fraction form
    713,584.20/984,745.71 = 391,299.78/x
  3. Step 3: Cross multiply
    713,584.20x = 984,745.71 × 391,299.78
  4. Step 4: Simplify right side
    713,584.20x = 385,330,779,678.94
  5. Step 5: Solve for x
    x = 385,330,779,678.94/713,584.20
  6. Step 6: Final answer
    x = 539,993.43

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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.