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Finding the Fourth Proportional to 618,893.16, 926,764.20 and 407,891.40

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Solution

The fourth proportional to 618,893.16, 926,764.20 and 407,891.40 is: 610,798.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    618,893.16 : 926,764.20 = 407,891.40 : x
  2. Step 2: Convert to fraction form
    618,893.16/926,764.20 = 407,891.40/x
  3. Step 3: Cross multiply
    618,893.16x = 926,764.20 × 407,891.40
  4. Step 4: Simplify right side
    618,893.16x = 378,019,147,007.88
  5. Step 5: Solve for x
    x = 378,019,147,007.88/618,893.16
  6. Step 6: Final answer
    x = 610,798.72

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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.