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Finding the Fourth Proportional to 528,857.70, 729,827.43 and 287,140.43

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Solution

The fourth proportional to 528,857.70, 729,827.43 and 287,140.43 is: 396,255.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    528,857.70 : 729,827.43 = 287,140.43 : x
  2. Step 2: Convert to fraction form
    528,857.70/729,827.43 = 287,140.43/x
  3. Step 3: Cross multiply
    528,857.70x = 729,827.43 × 287,140.43
  4. Step 4: Simplify right side
    528,857.70x = 209,562,962,076.00
  5. Step 5: Solve for x
    x = 209,562,962,076.00/528,857.70
  6. Step 6: Final answer
    x = 396,255.86

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.