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Finding the Fourth Proportional to 640,404.65, 883,842.90 and 619,374.62

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Solution

The fourth proportional to 640,404.65, 883,842.90 and 619,374.62 is: 854,818.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,404.65 : 883,842.90 = 619,374.62 : x
  2. Step 2: Convert to fraction form
    640,404.65/883,842.90 = 619,374.62/x
  3. Step 3: Cross multiply
    640,404.65x = 883,842.90 × 619,374.62
  4. Step 4: Simplify right side
    640,404.65x = 547,429,860,327.20
  5. Step 5: Solve for x
    x = 547,429,860,327.20/640,404.65
  6. Step 6: Final answer
    x = 854,818.68

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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.