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Finding the Fourth Proportional to 619,777.70, 855,257.29 and 347,820.20

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Solution

The fourth proportional to 619,777.70, 855,257.29 and 347,820.20 is: 479,971.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    619,777.70 : 855,257.29 = 347,820.20 : x
  2. Step 2: Convert to fraction form
    619,777.70/855,257.29 = 347,820.20/x
  3. Step 3: Cross multiply
    619,777.70x = 855,257.29 × 347,820.20
  4. Step 4: Simplify right side
    619,777.70x = 297,475,761,659.26
  5. Step 5: Solve for x
    x = 297,475,761,659.26/619,777.70
  6. Step 6: Final answer
    x = 479,971.71

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1.5x scale

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.