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Finding the Fourth Proportional to 619,258.10, 928,668.45 and 219,911.90

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Solution

The fourth proportional to 619,258.10, 928,668.45 and 219,911.90 is: 329,790.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    619,258.10 : 928,668.45 = 219,911.90 : x
  2. Step 2: Convert to fraction form
    619,258.10/928,668.45 = 219,911.90/x
  3. Step 3: Cross multiply
    619,258.10x = 928,668.45 × 219,911.90
  4. Step 4: Simplify right side
    619,258.10x = 204,225,243,309.56
  5. Step 5: Solve for x
    x = 204,225,243,309.56/619,258.10
  6. Step 6: Final answer
    x = 329,790.18

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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.