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Finding the Fourth Proportional to 391,122.48, 539,704.36 and 219,016.52

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Solution

The fourth proportional to 391,122.48, 539,704.36 and 219,016.52 is: 302,217.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,122.48 : 539,704.36 = 219,016.52 : x
  2. Step 2: Convert to fraction form
    391,122.48/539,704.36 = 219,016.52/x
  3. Step 3: Cross multiply
    391,122.48x = 539,704.36 × 219,016.52
  4. Step 4: Simplify right side
    391,122.48x = 118,204,170,756.03
  5. Step 5: Solve for x
    x = 118,204,170,756.03/391,122.48
  6. Step 6: Final answer
    x = 302,217.79

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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.