Home / 1,279,638,005.20-1,919,457,007.80-726,726,788.80

Finding the Fourth Proportional to 1,279,638,005.20, 1,919,457,007.80 and 726,726,788.80

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Solution

The fourth proportional to 1,279,638,005.20, 1,919,457,007.80 and 726,726,788.80 is: 1,090,090,183.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,279,638,005.20 : 1,919,457,007.80 = 726,726,788.80 : x
  2. Step 2: Convert to fraction form
    1,279,638,005.20/1,919,457,007.80 = 726,726,788.80/x
  3. Step 3: Cross multiply
    1,279,638,005.20x = 1,919,457,007.80 × 726,726,788.80
  4. Step 4: Simplify right side
    1,279,638,005.20x = 1,394,920,827,518,150,400
  5. Step 5: Solve for x
    x = 1,394,920,827,518,150,400/1,279,638,005.20
  6. Step 6: Final answer
    x = 1,090,090,183.20

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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.