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Finding the Fourth Proportional to 712,198.22, 982,833.77 and 389,928.78

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Solution

The fourth proportional to 712,198.22, 982,833.77 and 389,928.78 is: 538,101.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    712,198.22 : 982,833.77 = 389,928.78 : x
  2. Step 2: Convert to fraction form
    712,198.22/982,833.77 = 389,928.78/x
  3. Step 3: Cross multiply
    712,198.22x = 982,833.77 × 389,928.78
  4. Step 4: Simplify right side
    712,198.22x = 383,235,172,878.90
  5. Step 5: Solve for x
    x = 383,235,172,878.90/712,198.22
  6. Step 6: Final answer
    x = 538,101.84

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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.