Home / 919,107.92-1,378,662.36-420,122

Finding the Fourth Proportional to 919,107.92, 1,378,662.36 and 420,122

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Solution

The fourth proportional to 919,107.92, 1,378,662.36 and 420,122 is: 630,183.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    919,107.92 : 1,378,662.36 = 420,122 : x
  2. Step 2: Convert to fraction form
    919,107.92/1,378,662.36 = 420,122/x
  3. Step 3: Cross multiply
    919,107.92x = 1,378,662.36 × 420,122
  4. Step 4: Simplify right side
    919,107.92x = 579,206,388,007.92
  5. Step 5: Solve for x
    x = 579,206,388,007.92/919,107.92
  6. Step 6: Final answer
    x = 630,183.22

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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.