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Finding the Fourth Proportional to 260,321.22, 390,481.83 and 135,905.22

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Solution

The fourth proportional to 260,321.22, 390,481.83 and 135,905.22 is: 203,857.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    260,321.22 : 390,481.83 = 135,905.22 : x
  2. Step 2: Convert to fraction form
    260,321.22/390,481.83 = 135,905.22/x
  3. Step 3: Cross multiply
    260,321.22x = 390,481.83 × 135,905.22
  4. Step 4: Simplify right side
    260,321.22x = 53,068,519,012.15
  5. Step 5: Solve for x
    x = 53,068,519,012.15/260,321.22
  6. Step 6: Final answer
    x = 203,857.83

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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.