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Finding the Fourth Proportional to 618,639.89, 928,029.92 and 555,069.43

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Solution

The fourth proportional to 618,639.89, 928,029.92 and 555,069.43 is: 832,667.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    618,639.89 : 928,029.92 = 555,069.43 : x
  2. Step 2: Convert to fraction form
    618,639.89/928,029.92 = 555,069.43/x
  3. Step 3: Cross multiply
    618,639.89x = 928,029.92 × 555,069.43
  4. Step 4: Simplify right side
    618,639.89x = 515,121,043,005.11
  5. Step 5: Solve for x
    x = 515,121,043,005.11/618,639.89
  6. Step 6: Final answer
    x = 832,667.04

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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.