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Finding the Fourth Proportional to 521,706.60, 783,078.30 and 255,767.40

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Solution

The fourth proportional to 521,706.60, 783,078.30 and 255,767.40 is: 383,905.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    521,706.60 : 783,078.30 = 255,767.40 : x
  2. Step 2: Convert to fraction form
    521,706.60/783,078.30 = 255,767.40/x
  3. Step 3: Cross multiply
    521,706.60x = 783,078.30 × 255,767.40
  4. Step 4: Simplify right side
    521,706.60x = 200,285,900,787.42
  5. Step 5: Solve for x
    x = 200,285,900,787.42/521,706.60
  6. Step 6: Final answer
    x = 383,905.25

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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.