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Finding the Fourth Proportional to 618,895.16, 926,767.20 and 407,893.40

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Solution

The fourth proportional to 618,895.16, 926,767.20 and 407,893.40 is: 610,801.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    618,895.16 : 926,767.20 = 407,893.40 : x
  2. Step 2: Convert to fraction form
    618,895.16/926,767.20 = 407,893.40/x
  3. Step 3: Cross multiply
    618,895.16x = 926,767.20 × 407,893.40
  4. Step 4: Simplify right side
    618,895.16x = 378,022,224,216.48
  5. Step 5: Solve for x
    x = 378,022,224,216.48/618,895.16
  6. Step 6: Final answer
    x = 610,801.71

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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.