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Finding the Fourth Proportional to 619,886.90, 928,846.20 and 409,278.80

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Solution

The fourth proportional to 619,886.90, 928,846.20 and 409,278.80 is: 613,268.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    619,886.90 : 928,846.20 = 409,278.80 : x
  2. Step 2: Convert to fraction form
    619,886.90/928,846.20 = 409,278.80/x
  3. Step 3: Cross multiply
    619,886.90x = 928,846.20 × 409,278.80
  4. Step 4: Simplify right side
    619,886.90x = 380,157,058,120.56
  5. Step 5: Solve for x
    x = 380,157,058,120.56/619,886.90
  6. Step 6: Final answer
    x = 613,268.42

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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.