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Finding the Fourth Proportional to 262,928, 394,308.48 and 85,393.92

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Solution

The fourth proportional to 262,928, 394,308.48 and 85,393.92 is: 128,063.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    262,928 : 394,308.48 = 85,393.92 : x
  2. Step 2: Convert to fraction form
    262,928/394,308.48 = 85,393.92/x
  3. Step 3: Cross multiply
    262,928x = 394,308.48 × 85,393.92
  4. Step 4: Simplify right side
    262,928x = 33,671,546,796.44
  5. Step 5: Solve for x
    x = 33,671,546,796.44/262,928
  6. Step 6: Final answer
    x = 128,063.75

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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.