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Finding the Fourth Proportional to 405,847.20, 608,857.20 and 125,392.80

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Solution

The fourth proportional to 405,847.20, 608,857.20 and 125,392.80 is: 188,115.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    405,847.20 : 608,857.20 = 125,392.80 : x
  2. Step 2: Convert to fraction form
    405,847.20/608,857.20 = 125,392.80/x
  3. Step 3: Cross multiply
    405,847.20x = 608,857.20 × 125,392.80
  4. Step 4: Simplify right side
    405,847.20x = 76,346,309,108.16
  5. Step 5: Solve for x
    x = 76,346,309,108.16/405,847.20
  6. Step 6: Final answer
    x = 188,115.89

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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.