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Finding the Fourth Proportional to 619,879.80, 928,045.80 and 381,618.30

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Solution

The fourth proportional to 619,879.80, 928,045.80 and 381,618.30 is: 571,335.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    619,879.80 : 928,045.80 = 381,618.30 : x
  2. Step 2: Convert to fraction form
    619,879.80/928,045.80 = 381,618.30/x
  3. Step 3: Cross multiply
    619,879.80x = 928,045.80 × 381,618.30
  4. Step 4: Simplify right side
    619,879.80x = 354,159,260,518.14
  5. Step 5: Solve for x
    x = 354,159,260,518.14/619,879.80
  6. Step 6: Final answer
    x = 571,335.38

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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.