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Finding the Fourth Proportional to 405,643.94, 607,220.33 and 255,179.73

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Solution

The fourth proportional to 405,643.94, 607,220.33 and 255,179.73 is: 381,986.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    405,643.94 : 607,220.33 = 255,179.73 : x
  2. Step 2: Convert to fraction form
    405,643.94/607,220.33 = 255,179.73/x
  3. Step 3: Cross multiply
    405,643.94x = 607,220.33 × 255,179.73
  4. Step 4: Simplify right side
    405,643.94x = 154,950,316,504.84
  5. Step 5: Solve for x
    x = 154,950,316,504.84/405,643.94
  6. Step 6: Final answer
    x = 381,986.03

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1.5x scale

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.