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Finding the Fourth Proportional to 519,840.80, 780,106.80 and 295,200.80

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Solution

The fourth proportional to 519,840.80, 780,106.80 and 295,200.80 is: 442,997.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    519,840.80 : 780,106.80 = 295,200.80 : x
  2. Step 2: Convert to fraction form
    519,840.80/780,106.80 = 295,200.80/x
  3. Step 3: Cross multiply
    519,840.80x = 780,106.80 × 295,200.80
  4. Step 4: Simplify right side
    519,840.80x = 230,288,151,445.44
  5. Step 5: Solve for x
    x = 230,288,151,445.44/519,840.80
  6. Step 6: Final answer
    x = 442,997.46

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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.