Home / 1,214,004.80-1,821,007.20-415,215.20

Finding the Fourth Proportional to 1,214,004.80, 1,821,007.20 and 415,215.20

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Solution

The fourth proportional to 1,214,004.80, 1,821,007.20 and 415,215.20 is: 622,822.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,214,004.80 : 1,821,007.20 = 415,215.20 : x
  2. Step 2: Convert to fraction form
    1,214,004.80/1,821,007.20 = 415,215.20/x
  3. Step 3: Cross multiply
    1,214,004.80x = 1,821,007.20 × 415,215.20
  4. Step 4: Simplify right side
    1,214,004.80x = 756,109,868,749.44
  5. Step 5: Solve for x
    x = 756,109,868,749.44/1,214,004.80
  6. Step 6: Final answer
    x = 622,822.80

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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.