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Finding the Fourth Proportional to 603,909.60, 905,864.40 and 393,957.60

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Solution

The fourth proportional to 603,909.60, 905,864.40 and 393,957.60 is: 590,936.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    603,909.60 : 905,864.40 = 393,957.60 : x
  2. Step 2: Convert to fraction form
    603,909.60/905,864.40 = 393,957.60/x
  3. Step 3: Cross multiply
    603,909.60x = 905,864.40 × 393,957.60
  4. Step 4: Simplify right side
    603,909.60x = 356,872,164,949.44
  5. Step 5: Solve for x
    x = 356,872,164,949.44/603,909.60
  6. Step 6: Final answer
    x = 590,936.40

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Similar ratio
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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.