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Finding the Fourth Proportional to 521,610.40, 782,415.60 and 395,639.20

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Solution

The fourth proportional to 521,610.40, 782,415.60 and 395,639.20 is: 593,458.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    521,610.40 : 782,415.60 = 395,639.20 : x
  2. Step 2: Convert to fraction form
    521,610.40/782,415.60 = 395,639.20/x
  3. Step 3: Cross multiply
    521,610.40x = 782,415.60 × 395,639.20
  4. Step 4: Simplify right side
    521,610.40x = 309,554,282,051.52
  5. Step 5: Solve for x
    x = 309,554,282,051.52/521,610.40
  6. Step 6: Final answer
    x = 593,458.80

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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.