Home / 2,189,780.35-3,021,680.97-1,222,889.90

Finding the Fourth Proportional to 2,189,780.35, 3,021,680.97 and 1,222,889.90

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Solution

The fourth proportional to 2,189,780.35, 3,021,680.97 and 1,222,889.90 is: 1,687,467.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,189,780.35 : 3,021,680.97 = 1,222,889.90 : x
  2. Step 2: Convert to fraction form
    2,189,780.35/3,021,680.97 = 1,222,889.90/x
  3. Step 3: Cross multiply
    2,189,780.35x = 3,021,680.97 × 1,222,889.90
  4. Step 4: Simplify right side
    2,189,780.35x = 3,695,183,124,126.80
  5. Step 5: Solve for x
    x = 3,695,183,124,126.80/2,189,780.35
  6. Step 6: Final answer
    x = 1,687,467.48

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.