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Finding the Fourth Proportional to 621,607.76, 857,758.57 and 349,769.73

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Solution

The fourth proportional to 621,607.76, 857,758.57 and 349,769.73 is: 482,648.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    621,607.76 : 857,758.57 = 349,769.73 : x
  2. Step 2: Convert to fraction form
    621,607.76/857,758.57 = 349,769.73/x
  3. Step 3: Cross multiply
    621,607.76x = 857,758.57 × 349,769.73
  4. Step 4: Simplify right side
    621,607.76x = 300,017,983,434.09
  5. Step 5: Solve for x
    x = 300,017,983,434.09/621,607.76
  6. Step 6: Final answer
    x = 482,648.39

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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.