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Finding the Fourth Proportional to 619,356.60, 928,816.20 and 220,010.40

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Solution

The fourth proportional to 619,356.60, 928,816.20 and 220,010.40 is: 329,937.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    619,356.60 : 928,816.20 = 220,010.40 : x
  2. Step 2: Convert to fraction form
    619,356.60/928,816.20 = 220,010.40/x
  3. Step 3: Cross multiply
    619,356.60x = 928,816.20 × 220,010.40
  4. Step 4: Simplify right side
    619,356.60x = 204,349,223,688.48
  5. Step 5: Solve for x
    x = 204,349,223,688.48/619,356.60
  6. Step 6: Final answer
    x = 329,937.91

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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.