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Finding the Fourth Proportional to 689,738.56, 951,798.72 and 383,804.80

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Solution

The fourth proportional to 689,738.56, 951,798.72 and 383,804.80 is: 529,628.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    689,738.56 : 951,798.72 = 383,804.80 : x
  2. Step 2: Convert to fraction form
    689,738.56/951,798.72 = 383,804.80/x
  3. Step 3: Cross multiply
    689,738.56x = 951,798.72 × 383,804.80
  4. Step 4: Simplify right side
    689,738.56x = 365,304,917,369.86
  5. Step 5: Solve for x
    x = 365,304,917,369.86/689,738.56
  6. Step 6: Final answer
    x = 529,628.09

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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.