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Finding the Fourth Proportional to 619,660.67, 928,743.53 and 319,977.88

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Solution

The fourth proportional to 619,660.67, 928,743.53 and 319,977.88 is: 479,580.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    619,660.67 : 928,743.53 = 319,977.88 : x
  2. Step 2: Convert to fraction form
    619,660.67/928,743.53 = 319,977.88/x
  3. Step 3: Cross multiply
    619,660.67x = 928,743.53 × 319,977.88
  4. Step 4: Simplify right side
    619,660.67x = 297,177,385,412.64
  5. Step 5: Solve for x
    x = 297,177,385,412.64/619,660.67
  6. Step 6: Final answer
    x = 479,580.84

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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.