Home / 919,786.78-1,269,288.72-511,885.02

Finding the Fourth Proportional to 919,786.78, 1,269,288.72 and 511,885.02

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Solution

The fourth proportional to 919,786.78, 1,269,288.72 and 511,885.02 is: 706,391.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    919,786.78 : 1,269,288.72 = 511,885.02 : x
  2. Step 2: Convert to fraction form
    919,786.78/1,269,288.72 = 511,885.02/x
  3. Step 3: Cross multiply
    919,786.78x = 1,269,288.72 × 511,885.02
  4. Step 4: Simplify right side
    919,786.78x = 649,729,889,994.73
  5. Step 5: Solve for x
    x = 649,729,889,994.73/919,786.78
  6. Step 6: Final answer
    x = 706,391.86

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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.