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Finding the Fourth Proportional to 321,321.60, 481,521.60 and 236,419.20

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Solution

The fourth proportional to 321,321.60, 481,521.60 and 236,419.20 is: 354,289.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    321,321.60 : 481,521.60 = 236,419.20 : x
  2. Step 2: Convert to fraction form
    321,321.60/481,521.60 = 236,419.20/x
  3. Step 3: Cross multiply
    321,321.60x = 481,521.60 × 236,419.20
  4. Step 4: Simplify right side
    321,321.60x = 113,840,951,454.72
  5. Step 5: Solve for x
    x = 113,840,951,454.72/321,321.60
  6. Step 6: Final answer
    x = 354,289.76

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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.