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Finding the Fourth Proportional to 247,999.20, 371,589.20 and 211,135.20

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Solution

The fourth proportional to 247,999.20, 371,589.20 and 211,135.20 is: 316,354.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    247,999.20 : 371,589.20 = 211,135.20 : x
  2. Step 2: Convert to fraction form
    247,999.20/371,589.20 = 211,135.20/x
  3. Step 3: Cross multiply
    247,999.20x = 371,589.20 × 211,135.20
  4. Step 4: Simplify right side
    247,999.20x = 78,455,560,059.84
  5. Step 5: Solve for x
    x = 78,455,560,059.84/247,999.20
  6. Step 6: Final answer
    x = 316,354.09

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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.