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Finding the Fourth Proportional to 381,770.40, 571,489.20 and 297,789.60

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Solution

The fourth proportional to 381,770.40, 571,489.20 and 297,789.60 is: 445,774.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    381,770.40 : 571,489.20 = 297,789.60 : x
  2. Step 2: Convert to fraction form
    381,770.40/571,489.20 = 297,789.60/x
  3. Step 3: Cross multiply
    381,770.40x = 571,489.20 × 297,789.60
  4. Step 4: Simplify right side
    381,770.40x = 170,183,540,272.32
  5. Step 5: Solve for x
    x = 170,183,540,272.32/381,770.40
  6. Step 6: Final answer
    x = 445,774.58

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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.