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Finding the Fourth Proportional to 391,181.94, 539,704.89 and 219,074.22

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Solution

The fourth proportional to 391,181.94, 539,704.89 and 219,074.22 is: 302,251.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,181.94 : 539,704.89 = 219,074.22 : x
  2. Step 2: Convert to fraction form
    391,181.94/539,704.89 = 219,074.22/x
  3. Step 3: Cross multiply
    391,181.94x = 539,704.89 × 219,074.22
  4. Step 4: Simplify right side
    391,181.94x = 118,235,427,806.94
  5. Step 5: Solve for x
    x = 118,235,427,806.94/391,181.94
  6. Step 6: Final answer
    x = 302,251.75

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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.