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Finding the Fourth Proportional to 619,243.70, 928,865.55 and 449,969.90

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Solution

The fourth proportional to 619,243.70, 928,865.55 and 449,969.90 is: 674,954.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    619,243.70 : 928,865.55 = 449,969.90 : x
  2. Step 2: Convert to fraction form
    619,243.70/928,865.55 = 449,969.90/x
  3. Step 3: Cross multiply
    619,243.70x = 928,865.55 × 449,969.90
  4. Step 4: Simplify right side
    619,243.70x = 417,961,538,646.95
  5. Step 5: Solve for x
    x = 417,961,538,646.95/619,243.70
  6. Step 6: Final answer
    x = 674,954.85

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Double scale
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Similar ratio
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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.