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Finding the Fourth Proportional to 641,929.30, 962,893.95 and 455,305.30

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Solution

The fourth proportional to 641,929.30, 962,893.95 and 455,305.30 is: 682,957.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    641,929.30 : 962,893.95 = 455,305.30 : x
  2. Step 2: Convert to fraction form
    641,929.30/962,893.95 = 455,305.30/x
  3. Step 3: Cross multiply
    641,929.30x = 962,893.95 × 455,305.30
  4. Step 4: Simplify right side
    641,929.30x = 438,410,718,772.94
  5. Step 5: Solve for x
    x = 438,410,718,772.94/641,929.30
  6. Step 6: Final answer
    x = 682,957.95

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Half scale
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Double scale
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Similar ratio
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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.