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Finding the Fourth Proportional to 321,515.28, 482,235.72 and 84,876.48

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Solution

The fourth proportional to 321,515.28, 482,235.72 and 84,876.48 is: 127,304.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    321,515.28 : 482,235.72 = 84,876.48 : x
  2. Step 2: Convert to fraction form
    321,515.28/482,235.72 = 84,876.48/x
  3. Step 3: Cross multiply
    321,515.28x = 482,235.72 × 84,876.48
  4. Step 4: Simplify right side
    321,515.28x = 40,930,470,443.87
  5. Step 5: Solve for x
    x = 40,930,470,443.87/321,515.28
  6. Step 6: Final answer
    x = 127,304.90

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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.