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Finding the Fourth Proportional to 620,443.98, 928,913.13 and 505,912.86

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Solution

The fourth proportional to 620,443.98, 928,913.13 and 505,912.86 is: 757,440.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    620,443.98 : 928,913.13 = 505,912.86 : x
  2. Step 2: Convert to fraction form
    620,443.98/928,913.13 = 505,912.86/x
  3. Step 3: Cross multiply
    620,443.98x = 928,913.13 × 505,912.86
  4. Step 4: Simplify right side
    620,443.98x = 469,949,098,289.85
  5. Step 5: Solve for x
    x = 469,949,098,289.85/620,443.98
  6. Step 6: Final answer
    x = 757,440.02

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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.