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Finding the Fourth Proportional to 263,273.60, 394,910.40 and 85,778.30

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Solution

The fourth proportional to 263,273.60, 394,910.40 and 85,778.30 is: 128,667.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    263,273.60 : 394,910.40 = 85,778.30 : x
  2. Step 2: Convert to fraction form
    263,273.60/394,910.40 = 85,778.30/x
  3. Step 3: Cross multiply
    263,273.60x = 394,910.40 × 85,778.30
  4. Step 4: Simplify right side
    263,273.60x = 33,874,742,764.32
  5. Step 5: Solve for x
    x = 33,874,742,764.32/263,273.60
  6. Step 6: Final answer
    x = 128,667.45

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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.