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Finding the Fourth Proportional to 618,813.12, 928,355.76 and 198,131.52

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Solution

The fourth proportional to 618,813.12, 928,355.76 and 198,131.52 is: 297,240.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    618,813.12 : 928,355.76 = 198,131.52 : x
  2. Step 2: Convert to fraction form
    618,813.12/928,355.76 = 198,131.52/x
  3. Step 3: Cross multiply
    618,813.12x = 928,355.76 × 198,131.52
  4. Step 4: Simplify right side
    618,813.12x = 183,936,537,829.56
  5. Step 5: Solve for x
    x = 183,936,537,829.56/618,813.12
  6. Step 6: Final answer
    x = 297,240.85

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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.