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Finding the Fourth Proportional to 619,311.90, 865,986.90 and 619,311.90

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Solution

The fourth proportional to 619,311.90, 865,986.90 and 619,311.90 is: 865,986.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    619,311.90 : 865,986.90 = 619,311.90 : x
  2. Step 2: Convert to fraction form
    619,311.90/865,986.90 = 619,311.90/x
  3. Step 3: Cross multiply
    619,311.90x = 865,986.90 × 619,311.90
  4. Step 4: Simplify right side
    619,311.90x = 536,315,992,414.11
  5. Step 5: Solve for x
    x = 536,315,992,414.11/619,311.90
  6. Step 6: Final answer
    x = 865,986.90

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Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.