Home / 1,219,632.23-1,829,739.09-420,920.75

Finding the Fourth Proportional to 1,219,632.23, 1,829,739.09 and 420,920.75

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Solution

The fourth proportional to 1,219,632.23, 1,829,739.09 and 420,920.75 is: 631,481.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,219,632.23 : 1,829,739.09 = 420,920.75 : x
  2. Step 2: Convert to fraction form
    1,219,632.23/1,829,739.09 = 420,920.75/x
  3. Step 3: Cross multiply
    1,219,632.23x = 1,829,739.09 × 420,920.75
  4. Step 4: Simplify right side
    1,219,632.23x = 770,175,150,067.12
  5. Step 5: Solve for x
    x = 770,175,150,067.12/1,219,632.23
  6. Step 6: Final answer
    x = 631,481.47

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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.