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Finding the Fourth Proportional to 685,398.54, 945,849.78 and 383,592.54

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Solution

The fourth proportional to 685,398.54, 945,849.78 and 383,592.54 is: 529,357.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    685,398.54 : 945,849.78 = 383,592.54 : x
  2. Step 2: Convert to fraction form
    685,398.54/945,849.78 = 383,592.54/x
  3. Step 3: Cross multiply
    685,398.54x = 945,849.78 × 383,592.54
  4. Step 4: Simplify right side
    685,398.54x = 362,820,919,568.64
  5. Step 5: Solve for x
    x = 362,820,919,568.64/685,398.54
  6. Step 6: Final answer
    x = 529,357.59

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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.