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Finding the Fourth Proportional to 321,302.40, 481,953.60 and 121,629.30

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Solution

The fourth proportional to 321,302.40, 481,953.60 and 121,629.30 is: 182,443.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    321,302.40 : 481,953.60 = 121,629.30 : x
  2. Step 2: Convert to fraction form
    321,302.40/481,953.60 = 121,629.30/x
  3. Step 3: Cross multiply
    321,302.40x = 481,953.60 × 121,629.30
  4. Step 4: Simplify right side
    321,302.40x = 58,619,679,000.48
  5. Step 5: Solve for x
    x = 58,619,679,000.48/321,302.40
  6. Step 6: Final answer
    x = 182,443.95

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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.