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Finding the Fourth Proportional to 620,235.77, 929,791.85 and 430,785.59

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Solution

The fourth proportional to 620,235.77, 929,791.85 and 430,785.59 is: 645,788.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    620,235.77 : 929,791.85 = 430,785.59 : x
  2. Step 2: Convert to fraction form
    620,235.77/929,791.85 = 430,785.59/x
  3. Step 3: Cross multiply
    620,235.77x = 929,791.85 × 430,785.59
  4. Step 4: Simplify right side
    620,235.77x = 400,540,923,876.55
  5. Step 5: Solve for x
    x = 400,540,923,876.55/620,235.77
  6. Step 6: Final answer
    x = 645,788.18

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.