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Finding the Fourth Proportional to 619,005.20, 928,378.20 and 303,688.40

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Solution

The fourth proportional to 619,005.20, 928,378.20 and 303,688.40 is: 455,469.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    619,005.20 : 928,378.20 = 303,688.40 : x
  2. Step 2: Convert to fraction form
    619,005.20/928,378.20 = 303,688.40/x
  3. Step 3: Cross multiply
    619,005.20x = 928,378.20 × 303,688.40
  4. Step 4: Simplify right side
    619,005.20x = 281,937,690,152.88
  5. Step 5: Solve for x
    x = 281,937,690,152.88/619,005.20
  6. Step 6: Final answer
    x = 455,469.02

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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.