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Finding the Fourth Proportional to 619,411.20, 929,189.70 and 219,967.80

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Solution

The fourth proportional to 619,411.20, 929,189.70 and 219,967.80 is: 329,977.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    619,411.20 : 929,189.70 = 219,967.80 : x
  2. Step 2: Convert to fraction form
    619,411.20/929,189.70 = 219,967.80/x
  3. Step 3: Cross multiply
    619,411.20x = 929,189.70 × 219,967.80
  4. Step 4: Simplify right side
    619,411.20x = 204,391,814,091.66
  5. Step 5: Solve for x
    x = 204,391,814,091.66/619,411.20
  6. Step 6: Final answer
    x = 329,977.59

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1.5x scale

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.