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Finding the Fourth Proportional to 411,691.20, 617,383.20 and 162,321.60

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Solution

The fourth proportional to 411,691.20, 617,383.20 and 162,321.60 is: 243,421.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    411,691.20 : 617,383.20 = 162,321.60 : x
  2. Step 2: Convert to fraction form
    411,691.20/617,383.20 = 162,321.60/x
  3. Step 3: Cross multiply
    411,691.20x = 617,383.20 × 162,321.60
  4. Step 4: Simplify right side
    411,691.20x = 100,214,628,837.12
  5. Step 5: Solve for x
    x = 100,214,628,837.12/411,691.20
  6. Step 6: Final answer
    x = 243,421.84

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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.