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Finding the Fourth Proportional to 287,212.80, 430,819.20 and 162,796.80

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Solution

The fourth proportional to 287,212.80, 430,819.20 and 162,796.80 is: 244,195.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,212.80 : 430,819.20 = 162,796.80 : x
  2. Step 2: Convert to fraction form
    287,212.80/430,819.20 = 162,796.80/x
  3. Step 3: Cross multiply
    287,212.80x = 430,819.20 × 162,796.80
  4. Step 4: Simplify right side
    287,212.80x = 70,135,987,138.56
  5. Step 5: Solve for x
    x = 70,135,987,138.56/287,212.80
  6. Step 6: Final answer
    x = 244,195.20

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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.