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Finding the Fourth Proportional to 256,497.39, 384,765.42 and 76,568.61

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Solution

The fourth proportional to 256,497.39, 384,765.42 and 76,568.61 is: 114,858.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    256,497.39 : 384,765.42 = 76,568.61 : x
  2. Step 2: Convert to fraction form
    256,497.39/384,765.42 = 76,568.61/x
  3. Step 3: Cross multiply
    256,497.39x = 384,765.42 × 76,568.61
  4. Step 4: Simplify right side
    256,497.39x = 29,460,953,385.47
  5. Step 5: Solve for x
    x = 29,460,953,385.47/256,497.39
  6. Step 6: Final answer
    x = 114,858.69

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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.