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Finding the Fourth Proportional to 405,776.40, 608,664.60 and 384,003.60

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Solution

The fourth proportional to 405,776.40, 608,664.60 and 384,003.60 is: 576,005.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    405,776.40 : 608,664.60 = 384,003.60 : x
  2. Step 2: Convert to fraction form
    405,776.40/608,664.60 = 384,003.60/x
  3. Step 3: Cross multiply
    405,776.40x = 608,664.60 × 384,003.60
  4. Step 4: Simplify right side
    405,776.40x = 233,729,397,592.56
  5. Step 5: Solve for x
    x = 233,729,397,592.56/405,776.40
  6. Step 6: Final answer
    x = 576,005.40

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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.