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Finding the Fourth Proportional to 391,533.44, 587,299.84 and 111,053.12

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Solution

The fourth proportional to 391,533.44, 587,299.84 and 111,053.12 is: 166,579.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,533.44 : 587,299.84 = 111,053.12 : x
  2. Step 2: Convert to fraction form
    391,533.44/587,299.84 = 111,053.12/x
  3. Step 3: Cross multiply
    391,533.44x = 587,299.84 × 111,053.12
  4. Step 4: Simplify right side
    391,533.44x = 65,221,479,607.50
  5. Step 5: Solve for x
    x = 65,221,479,607.50/391,533.44
  6. Step 6: Final answer
    x = 166,579.59

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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.