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Finding the Fourth Proportional to 256,335.01, 384,568.17 and 78,843.58

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Solution

The fourth proportional to 256,335.01, 384,568.17 and 78,843.58 is: 118,285.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    256,335.01 : 384,568.17 = 78,843.58 : x
  2. Step 2: Convert to fraction form
    256,335.01/384,568.17 = 78,843.58/x
  3. Step 3: Cross multiply
    256,335.01x = 384,568.17 × 78,843.58
  4. Step 4: Simplify right side
    256,335.01x = 30,320,731,276.85
  5. Step 5: Solve for x
    x = 30,320,731,276.85/256,335.01
  6. Step 6: Final answer
    x = 118,285.56

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1.5x scale

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.