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Finding the Fourth Proportional to 619,868.40, 929,802.60 and 419,101.80

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Solution

The fourth proportional to 619,868.40, 929,802.60 and 419,101.80 is: 628,652.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    619,868.40 : 929,802.60 = 419,101.80 : x
  2. Step 2: Convert to fraction form
    619,868.40/929,802.60 = 419,101.80/x
  3. Step 3: Cross multiply
    619,868.40x = 929,802.60 × 419,101.80
  4. Step 4: Simplify right side
    619,868.40x = 389,681,943,304.68
  5. Step 5: Solve for x
    x = 389,681,943,304.68/619,868.40
  6. Step 6: Final answer
    x = 628,652.70

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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.