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Finding the Fourth Proportional to 639,338.59, 882,282.92 and 352,858.68

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Solution

The fourth proportional to 639,338.59, 882,282.92 and 352,858.68 is: 486,942.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,338.59 : 882,282.92 = 352,858.68 : x
  2. Step 2: Convert to fraction form
    639,338.59/882,282.92 = 352,858.68/x
  3. Step 3: Cross multiply
    639,338.59x = 882,282.92 × 352,858.68
  4. Step 4: Simplify right side
    639,338.59x = 311,321,181,464.89
  5. Step 5: Solve for x
    x = 311,321,181,464.89/639,338.59
  6. Step 6: Final answer
    x = 486,942.58

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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.