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Finding the Fourth Proportional to 256,745.20, 384,388.80 and 242,780.80

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Solution

The fourth proportional to 256,745.20, 384,388.80 and 242,780.80 is: 363,481.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    256,745.20 : 384,388.80 = 242,780.80 : x
  2. Step 2: Convert to fraction form
    256,745.20/384,388.80 = 242,780.80/x
  3. Step 3: Cross multiply
    256,745.20x = 384,388.80 × 242,780.80
  4. Step 4: Simplify right side
    256,745.20x = 93,322,220,375.04
  5. Step 5: Solve for x
    x = 93,322,220,375.04/256,745.20
  6. Step 6: Final answer
    x = 363,481.85

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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.