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Finding the Fourth Proportional to 411,679.20, 617,365.20 and 162,309.60

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Solution

The fourth proportional to 411,679.20, 617,365.20 and 162,309.60 is: 243,403.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    411,679.20 : 617,365.20 = 162,309.60 : x
  2. Step 2: Convert to fraction form
    411,679.20/617,365.20 = 162,309.60/x
  3. Step 3: Cross multiply
    411,679.20x = 617,365.20 × 162,309.60
  4. Step 4: Simplify right side
    411,679.20x = 100,204,298,665.92
  5. Step 5: Solve for x
    x = 100,204,298,665.92/411,679.20
  6. Step 6: Final answer
    x = 243,403.84

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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.