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Finding the Fourth Proportional to 621,855.36, 857,127.36 and 440,334.72

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Solution

The fourth proportional to 621,855.36, 857,127.36 and 440,334.72 is: 606,930.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    621,855.36 : 857,127.36 = 440,334.72 : x
  2. Step 2: Convert to fraction form
    621,855.36/857,127.36 = 440,334.72/x
  3. Step 3: Cross multiply
    621,855.36x = 857,127.36 × 440,334.72
  4. Step 4: Simplify right side
    621,855.36x = 377,422,936,069.94
  5. Step 5: Solve for x
    x = 377,422,936,069.94/621,855.36
  6. Step 6: Final answer
    x = 606,930.42

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.