Home / 1,214,003.80-1,821,005.70-415,214.20

Finding the Fourth Proportional to 1,214,003.80, 1,821,005.70 and 415,214.20

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Solution

The fourth proportional to 1,214,003.80, 1,821,005.70 and 415,214.20 is: 622,821.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,214,003.80 : 1,821,005.70 = 415,214.20 : x
  2. Step 2: Convert to fraction form
    1,214,003.80/1,821,005.70 = 415,214.20/x
  3. Step 3: Cross multiply
    1,214,003.80x = 1,821,005.70 × 415,214.20
  4. Step 4: Simplify right side
    1,214,003.80x = 756,107,424,920.94
  5. Step 5: Solve for x
    x = 756,107,424,920.94/1,214,003.80
  6. Step 6: Final answer
    x = 622,821.30

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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.