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Finding the Fourth Proportional to 281,937.20, 422,128.20 and 219,729.20

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Solution

The fourth proportional to 281,937.20, 422,128.20 and 219,729.20 is: 328,987.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    281,937.20 : 422,128.20 = 219,729.20 : x
  2. Step 2: Convert to fraction form
    281,937.20/422,128.20 = 219,729.20/x
  3. Step 3: Cross multiply
    281,937.20x = 422,128.20 × 219,729.20
  4. Step 4: Simplify right side
    281,937.20x = 92,753,891,683.44
  5. Step 5: Solve for x
    x = 92,753,891,683.44/281,937.20
  6. Step 6: Final answer
    x = 328,987.77

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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.