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Finding the Fourth Proportional to 391,579.80, 587,392.02 and 111,075

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Solution

The fourth proportional to 391,579.80, 587,392.02 and 111,075 is: 166,618.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,579.80 : 587,392.02 = 111,075 : x
  2. Step 2: Convert to fraction form
    391,579.80/587,392.02 = 111,075/x
  3. Step 3: Cross multiply
    391,579.80x = 587,392.02 × 111,075
  4. Step 4: Simplify right side
    391,579.80x = 65,244,568,621.50
  5. Step 5: Solve for x
    x = 65,244,568,621.50/391,579.80
  6. Step 6: Final answer
    x = 166,618.83

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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.