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Finding the Fourth Proportional to 391,681, 587,520.06 and 111,198.28

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Solution

The fourth proportional to 391,681, 587,520.06 and 111,198.28 is: 166,797.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,681 : 587,520.06 = 111,198.28 : x
  2. Step 2: Convert to fraction form
    391,681/587,520.06 = 111,198.28/x
  3. Step 3: Cross multiply
    391,681x = 587,520.06 × 111,198.28
  4. Step 4: Simplify right side
    391,681x = 65,331,220,137.50
  5. Step 5: Solve for x
    x = 65,331,220,137.50/391,681
  6. Step 6: Final answer
    x = 166,797.01

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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.