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Finding the Fourth Proportional to 281,930.20, 422,967.30 and 198,986.20

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Solution

The fourth proportional to 281,930.20, 422,967.30 and 198,986.20 is: 298,530.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    281,930.20 : 422,967.30 = 198,986.20 : x
  2. Step 2: Convert to fraction form
    281,930.20/422,967.30 = 198,986.20/x
  3. Step 3: Cross multiply
    281,930.20x = 422,967.30 × 198,986.20
  4. Step 4: Simplify right side
    281,930.20x = 84,164,655,751.26
  5. Step 5: Solve for x
    x = 84,164,655,751.26/281,930.20
  6. Step 6: Final answer
    x = 298,530.12

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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.