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Finding the Fourth Proportional to 619,083.71, 853,973.57 and 389,277.15

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Solution

The fourth proportional to 619,083.71, 853,973.57 and 389,277.15 is: 536,974.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    619,083.71 : 853,973.57 = 389,277.15 : x
  2. Step 2: Convert to fraction form
    619,083.71/853,973.57 = 389,277.15/x
  3. Step 3: Cross multiply
    619,083.71x = 853,973.57 × 389,277.15
  4. Step 4: Simplify right side
    619,083.71x = 332,432,395,558.54
  5. Step 5: Solve for x
    x = 332,432,395,558.54/619,083.71
  6. Step 6: Final answer
    x = 536,974.88

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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.