Home / 1,321,267.20-1,981,900.80-1,115,980.80

Finding the Fourth Proportional to 1,321,267.20, 1,981,900.80 and 1,115,980.80

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Solution

The fourth proportional to 1,321,267.20, 1,981,900.80 and 1,115,980.80 is: 1,673,971.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,321,267.20 : 1,981,900.80 = 1,115,980.80 : x
  2. Step 2: Convert to fraction form
    1,321,267.20/1,981,900.80 = 1,115,980.80/x
  3. Step 3: Cross multiply
    1,321,267.20x = 1,981,900.80 × 1,115,980.80
  4. Step 4: Simplify right side
    1,321,267.20x = 2,211,763,240,304.64
  5. Step 5: Solve for x
    x = 2,211,763,240,304.64/1,321,267.20
  6. Step 6: Final answer
    x = 1,673,971.20

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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.