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Finding the Fourth Proportional to 640,399.80, 959,217.30 and 529,807.80

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Solution

The fourth proportional to 640,399.80, 959,217.30 and 529,807.80 is: 793,568.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,399.80 : 959,217.30 = 529,807.80 : x
  2. Step 2: Convert to fraction form
    640,399.80/959,217.30 = 529,807.80/x
  3. Step 3: Cross multiply
    640,399.80x = 959,217.30 × 529,807.80
  4. Step 4: Simplify right side
    640,399.80x = 508,200,807,434.94
  5. Step 5: Solve for x
    x = 508,200,807,434.94/640,399.80
  6. Step 6: Final answer
    x = 793,568.03

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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.