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Finding the Fourth Proportional to 663,145.20, 994,717.80 and 219,855.60

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Solution

The fourth proportional to 663,145.20, 994,717.80 and 219,855.60 is: 329,783.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    663,145.20 : 994,717.80 = 219,855.60 : x
  2. Step 2: Convert to fraction form
    663,145.20/994,717.80 = 219,855.60/x
  3. Step 3: Cross multiply
    663,145.20x = 994,717.80 × 219,855.60
  4. Step 4: Simplify right side
    663,145.20x = 218,694,278,749.68
  5. Step 5: Solve for x
    x = 218,694,278,749.68/663,145.20
  6. Step 6: Final answer
    x = 329,783.40

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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.