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Finding the Fourth Proportional to 262,486.60, 393,787.32 and 85,011.55

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Solution

The fourth proportional to 262,486.60, 393,787.32 and 85,011.55 is: 127,535.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    262,486.60 : 393,787.32 = 85,011.55 : x
  2. Step 2: Convert to fraction form
    262,486.60/393,787.32 = 85,011.55/x
  3. Step 3: Cross multiply
    262,486.60x = 393,787.32 × 85,011.55
  4. Step 4: Simplify right side
    262,486.60x = 33,476,470,018.49
  5. Step 5: Solve for x
    x = 33,476,470,018.49/262,486.60
  6. Step 6: Final answer
    x = 127,535.92

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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.