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Finding the Fourth Proportional to 643,996.58, 888,719.24 and 353,620.69

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Solution

The fourth proportional to 643,996.58, 888,719.24 and 353,620.69 is: 487,998.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,996.58 : 888,719.24 = 353,620.69 : x
  2. Step 2: Convert to fraction form
    643,996.58/888,719.24 = 353,620.69/x
  3. Step 3: Cross multiply
    643,996.58x = 888,719.24 × 353,620.69
  4. Step 4: Simplify right side
    643,996.58x = 314,269,509,527.33
  5. Step 5: Solve for x
    x = 314,269,509,527.33/643,996.58
  6. Step 6: Final answer
    x = 487,998.73

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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.