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Finding the Fourth Proportional to 693,486.60, 1,040,310.90 and 220,219.80

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Solution

The fourth proportional to 693,486.60, 1,040,310.90 and 220,219.80 is: 330,355.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    693,486.60 : 1,040,310.90 = 220,219.80 : x
  2. Step 2: Convert to fraction form
    693,486.60/1,040,310.90 = 220,219.80/x
  3. Step 3: Cross multiply
    693,486.60x = 1,040,310.90 × 220,219.80
  4. Step 4: Simplify right side
    693,486.60x = 229,097,058,335.82
  5. Step 5: Solve for x
    x = 229,097,058,335.82/693,486.60
  6. Step 6: Final answer
    x = 330,355.42

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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.