Home / 742,639.38-1,112,961.24-405,174.33

Finding the Fourth Proportional to 742,639.38, 1,112,961.24 and 405,174.33

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Solution

The fourth proportional to 742,639.38, 1,112,961.24 and 405,174.33 is: 607,217.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    742,639.38 : 1,112,961.24 = 405,174.33 : x
  2. Step 2: Convert to fraction form
    742,639.38/1,112,961.24 = 405,174.33/x
  3. Step 3: Cross multiply
    742,639.38x = 1,112,961.24 × 405,174.33
  4. Step 4: Simplify right side
    742,639.38x = 450,943,324,732.97
  5. Step 5: Solve for x
    x = 450,943,324,732.97/742,639.38
  6. Step 6: Final answer
    x = 607,217.09

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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.