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Finding the Fourth Proportional to 213,620.10, 320,430.15 and 204,519.30

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Solution

The fourth proportional to 213,620.10, 320,430.15 and 204,519.30 is: 306,778.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    213,620.10 : 320,430.15 = 204,519.30 : x
  2. Step 2: Convert to fraction form
    213,620.10/320,430.15 = 204,519.30/x
  3. Step 3: Cross multiply
    213,620.10x = 320,430.15 × 204,519.30
  4. Step 4: Simplify right side
    213,620.10x = 65,534,149,976.90
  5. Step 5: Solve for x
    x = 65,534,149,976.90/213,620.10
  6. Step 6: Final answer
    x = 306,778.95

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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.