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Finding the Fourth Proportional to 685,005.90, 945,306.81 and 383,199.90

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Solution

The fourth proportional to 685,005.90, 945,306.81 and 383,199.90 is: 528,815.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    685,005.90 : 945,306.81 = 383,199.90 : x
  2. Step 2: Convert to fraction form
    685,005.90/945,306.81 = 383,199.90/x
  3. Step 3: Cross multiply
    685,005.90x = 945,306.81 × 383,199.90
  4. Step 4: Simplify right side
    685,005.90x = 362,241,475,061.32
  5. Step 5: Solve for x
    x = 362,241,475,061.32/685,005.90
  6. Step 6: Final answer
    x = 528,815.12

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.