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Finding the Fourth Proportional to 470,687.20, 705,593.40 and 328,532.20

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Solution

The fourth proportional to 470,687.20, 705,593.40 and 328,532.20 is: 492,493.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    470,687.20 : 705,593.40 = 328,532.20 : x
  2. Step 2: Convert to fraction form
    470,687.20/705,593.40 = 328,532.20/x
  3. Step 3: Cross multiply
    470,687.20x = 705,593.40 × 328,532.20
  4. Step 4: Simplify right side
    470,687.20x = 231,810,152,007.48
  5. Step 5: Solve for x
    x = 231,810,152,007.48/470,687.20
  6. Step 6: Final answer
    x = 492,493.00

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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.