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Finding the Fourth Proportional to 619,201.80, 928,802.70 and 198,520.20

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Solution

The fourth proportional to 619,201.80, 928,802.70 and 198,520.20 is: 297,780.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    619,201.80 : 928,802.70 = 198,520.20 : x
  2. Step 2: Convert to fraction form
    619,201.80/928,802.70 = 198,520.20/x
  3. Step 3: Cross multiply
    619,201.80x = 928,802.70 × 198,520.20
  4. Step 4: Simplify right side
    619,201.80x = 184,386,097,764.54
  5. Step 5: Solve for x
    x = 184,386,097,764.54/619,201.80
  6. Step 6: Final answer
    x = 297,780.30

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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.