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Finding the Fourth Proportional to 415,801.20, 622,780.20 and 322,002.80

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Solution

The fourth proportional to 415,801.20, 622,780.20 and 322,002.80 is: 482,290.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    415,801.20 : 622,780.20 = 322,002.80 : x
  2. Step 2: Convert to fraction form
    415,801.20/622,780.20 = 322,002.80/x
  3. Step 3: Cross multiply
    415,801.20x = 622,780.20 × 322,002.80
  4. Step 4: Simplify right side
    415,801.20x = 200,536,968,184.56
  5. Step 5: Solve for x
    x = 200,536,968,184.56/415,801.20
  6. Step 6: Final answer
    x = 482,290.50

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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.