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Finding the Fourth Proportional to 619,662.80, 928,111.80 and 509,070.80

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Solution

The fourth proportional to 619,662.80, 928,111.80 and 509,070.80 is: 762,470.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    619,662.80 : 928,111.80 = 509,070.80 : x
  2. Step 2: Convert to fraction form
    619,662.80/928,111.80 = 509,070.80/x
  3. Step 3: Cross multiply
    619,662.80x = 928,111.80 × 509,070.80
  4. Step 4: Simplify right side
    619,662.80x = 472,474,616,515.44
  5. Step 5: Solve for x
    x = 472,474,616,515.44/619,662.80
  6. Step 6: Final answer
    x = 762,470.52

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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.