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Finding the Fourth Proportional to 639,560.32, 882,708.78 and 381,453.82

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Solution

The fourth proportional to 639,560.32, 882,708.78 and 381,453.82 is: 526,475.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,560.32 : 882,708.78 = 381,453.82 : x
  2. Step 2: Convert to fraction form
    639,560.32/882,708.78 = 381,453.82/x
  3. Step 3: Cross multiply
    639,560.32x = 882,708.78 × 381,453.82
  4. Step 4: Simplify right side
    639,560.32x = 336,712,636,078.54
  5. Step 5: Solve for x
    x = 336,712,636,078.54/639,560.32
  6. Step 6: Final answer
    x = 526,475.18

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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.