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Finding the Fourth Proportional to 321,259.60, 481,428.60 and 236,357.20

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Solution

The fourth proportional to 321,259.60, 481,428.60 and 236,357.20 is: 354,196.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    321,259.60 : 481,428.60 = 236,357.20 : x
  2. Step 2: Convert to fraction form
    321,259.60/481,428.60 = 236,357.20/x
  3. Step 3: Cross multiply
    321,259.60x = 481,428.60 × 236,357.20
  4. Step 4: Simplify right side
    321,259.60x = 113,789,115,895.92
  5. Step 5: Solve for x
    x = 113,789,115,895.92/321,259.60
  6. Step 6: Final answer
    x = 354,196.78

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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.