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Finding the Fourth Proportional to 621,606.76, 857,757.20 and 349,768.73

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Solution

The fourth proportional to 621,606.76, 857,757.20 and 349,768.73 is: 482,647.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    621,606.76 : 857,757.20 = 349,768.73 : x
  2. Step 2: Convert to fraction form
    621,606.76/857,757.20 = 349,768.73/x
  3. Step 3: Cross multiply
    621,606.76x = 857,757.20 × 349,768.73
  4. Step 4: Simplify right side
    621,606.76x = 300,016,646,887.91
  5. Step 5: Solve for x
    x = 300,016,646,887.91/621,606.76
  6. Step 6: Final answer
    x = 482,647.02

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Double scale
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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.