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Finding the Fourth Proportional to 639,756.36, 959,635.76 and 166,440.96

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Solution

The fourth proportional to 639,756.36, 959,635.76 and 166,440.96 is: 249,661.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,756.36 : 959,635.76 = 166,440.96 : x
  2. Step 2: Convert to fraction form
    639,756.36/959,635.76 = 166,440.96/x
  3. Step 3: Cross multiply
    639,756.36x = 959,635.76 × 166,440.96
  4. Step 4: Simplify right side
    639,756.36x = 159,722,697,144.73
  5. Step 5: Solve for x
    x = 159,722,697,144.73/639,756.36
  6. Step 6: Final answer
    x = 249,661.76

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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.