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Finding the Fourth Proportional to 481,219.76, 663,930.60 and 279,976.88

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Solution

The fourth proportional to 481,219.76, 663,930.60 and 279,976.88 is: 386,279.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    481,219.76 : 663,930.60 = 279,976.88 : x
  2. Step 2: Convert to fraction form
    481,219.76/663,930.60 = 279,976.88/x
  3. Step 3: Cross multiply
    481,219.76x = 663,930.60 × 279,976.88
  4. Step 4: Simplify right side
    481,219.76x = 185,885,217,924.53
  5. Step 5: Solve for x
    x = 185,885,217,924.53/481,219.76
  6. Step 6: Final answer
    x = 386,279.27

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.