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Finding the Fourth Proportional to 681,057.90, 939,972.02 and 519,607.88

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Solution

The fourth proportional to 681,057.90, 939,972.02 and 519,607.88 is: 717,144.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    681,057.90 : 939,972.02 = 519,607.88 : x
  2. Step 2: Convert to fraction form
    681,057.90/939,972.02 = 519,607.88/x
  3. Step 3: Cross multiply
    681,057.90x = 939,972.02 × 519,607.88
  4. Step 4: Simplify right side
    681,057.90x = 488,416,868,571.52
  5. Step 5: Solve for x
    x = 488,416,868,571.52/681,057.90
  6. Step 6: Final answer
    x = 717,144.41

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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.