Home / 427,983.92-641,974.31-128,463.20

Finding the Fourth Proportional to 427,983.92, 641,974.31 and 128,463.20

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Solution

The fourth proportional to 427,983.92, 641,974.31 and 128,463.20 is: 192,694.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    427,983.92 : 641,974.31 = 128,463.20 : x
  2. Step 2: Convert to fraction form
    427,983.92/641,974.31 = 128,463.20/x
  3. Step 3: Cross multiply
    427,983.92x = 641,974.31 × 128,463.20
  4. Step 4: Simplify right side
    427,983.92x = 82,470,074,180.39
  5. Step 5: Solve for x
    x = 82,470,074,180.39/427,983.92
  6. Step 6: Final answer
    x = 192,694.33

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Double scale
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Similar ratio
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1.5x scale

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.